diff --git a/.gitignore b/.gitignore
index b318229b87..65228df706 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,3 +18,5 @@ Source*.ttf
 # ignore jekyll files in docs folder
 docs/_site/*
 docs/.jekyll-cache
+.venv
+.DS_Store
diff --git a/Italic/SourceSerif4Variable-Italic.designspace b/Italic/SourceSerif4Variable-Italic.designspace
index e9e2f0f87c..1065e995a7 100644
--- a/Italic/SourceSerif4Variable-Italic.designspace
+++ b/Italic/SourceSerif4Variable-Italic.designspace
@@ -9,31 +9,11 @@
             <map input="700" output="828" /> <!-- Bold -->
             <map input="900" output="1000" /><!-- Black -->
         </axis>
-        <axis default="20" maximum="60" minimum="8" name="optical" tag="opsz" />
     </axes>
     <sources>
-        <source filename="Masters/caption/master_0/SourceSerif-Italic_c0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_1/SourceSerif-Italic_c1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_2/SourceSerif-Italic_c2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
         <source filename="Masters/text/master_0/SourceSerif-Italic_0.ufo">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source familyname="Source Serif 4 Variable" filename="Masters/text/master_1/SourceSerif-Italic_1.ufo">
@@ -41,135 +21,18 @@
             <info copy="1" />
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source filename="Masters/text/master_2/SourceSerif-Italic_2.ufo">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_0/SourceSerif-Italic_d0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_1/SourceSerif-Italic_d1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_2/SourceSerif-Italic_d2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
         </source>
     </sources>
     <instances>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionExtraLightItalic" stylename="Caption ExtraLight Italic">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionLightItalic" stylename="Caption Light Italic">
-            <location>
-                <dimension name="weight" xvalue="155" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionRegularItalic" stylename="Caption Italic">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionSemiboldItalic" stylename="Caption Semibold Italic">
-            <location>
-                <dimension name="weight" xvalue="611" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionBoldItalic" stylename="Caption Bold Italic">
-            <location>
-                <dimension name="weight" xvalue="828" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionBlackItalic" stylename="Caption Black Italic">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextExtraLightItalic" stylename="SmText ExtraLight Italic">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextLightItalic" stylename="SmText Light Italic">
-            <location>
-                <dimension name="weight" xvalue="155" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextRegularItalic" stylename="SmText Italic">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextSemiboldItalic" stylename="SmText Semibold Italic">
-            <location>
-                <dimension name="weight" xvalue="611" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextBoldItalic" stylename="SmText Bold Italic">
-            <location>
-                <dimension name="weight" xvalue="828" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextBlackItalic" stylename="SmText Black Italic">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
         <instance postscriptfontname="SourceSerif4Variable-ExtraLightItalic" stylename="ExtraLight Italic">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -177,7 +40,6 @@
         <instance postscriptfontname="SourceSerif4Variable-LightItalic" stylename="Light Italic">
             <location>
                 <dimension name="weight" xvalue="155" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -186,7 +48,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Italic" stylename="Italic">
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -194,7 +55,6 @@
         <instance postscriptfontname="SourceSerif4Variable-SemiboldItalic" stylename="Semibold Italic">
             <location>
                 <dimension name="weight" xvalue="611" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -202,7 +62,6 @@
         <instance postscriptfontname="SourceSerif4Variable-BoldItalic" stylename="Bold Italic">
             <location>
                 <dimension name="weight" xvalue="828" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -210,103 +69,6 @@
         <instance postscriptfontname="SourceSerif4Variable-BlackItalic" stylename="Black Italic">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadExtraLightItalic" stylename="Subhead ExtraLight Italic">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadLightItalic" stylename="Subhead Light Italic">
-            <location>
-                <dimension name="weight" xvalue="155" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadRegularItalic" stylename="Subhead Italic">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadSemiboldItalic" stylename="Subhead Semibold Italic">
-            <location>
-                <dimension name="weight" xvalue="611" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadBoldItalic" stylename="Subhead Bold Italic">
-            <location>
-                <dimension name="weight" xvalue="828" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadBlackItalic" stylename="Subhead Black Italic">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayExtraLightItalic" stylename="Display ExtraLight Italic">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayLightItalic" stylename="Display Light Italic">
-            <location>
-                <dimension name="weight" xvalue="155" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayRegularItalic" stylename="Display Italic">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplaySemiboldItalic" stylename="Display Semibold Italic">
-            <location>
-                <dimension name="weight" xvalue="611" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayBoldItalic" stylename="Display Bold Italic">
-            <location>
-                <dimension name="weight" xvalue="828" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayBlackItalic" stylename="Display Black Italic">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
             <kerning />
             <info />
diff --git a/Roman/SourceSerif4.designspace b/Roman/SourceSerif4.designspace
index a3fd293bf8..a589de44b2 100644
--- a/Roman/SourceSerif4.designspace
+++ b/Roman/SourceSerif4.designspace
@@ -1,32 +1,12 @@
 <?xml version='1.0' encoding='utf-8'?>
 <designspace format="3">
     <axes>
-        <axis default="20" maximum="60" minimum="8" name="optical" tag="opsz" />
         <axis default="394" maximum="1000" minimum="0" name="weight" tag="wght" />
     </axes>
     <sources>
-        <source filename="Masters/caption/master_0/SourceSerif_c0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_1/SourceSerif_c1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_2/SourceSerif_c2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
         <source filename="Masters/text/master_0/SourceSerif_0.ufo">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source filename="Masters/text/master_1/SourceSerif_1.ufo">
@@ -35,135 +15,18 @@
             <info copy="1" />
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source filename="Masters/text/master_2/SourceSerif_2.ufo">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_0/SourceSerif_d0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_1/SourceSerif_d1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_2/SourceSerif_d2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
         </source>
     </sources>
     <instances>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/ExtraLight/font.ufo" postscriptfontname="SourceSerif4Caption-ExtraLight" stylename="ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/Light/font.ufo" postscriptfontname="SourceSerif4Caption-Light" stylename="Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/Regular/font.ufo" postscriptfontname="SourceSerif4Caption-Regular" stylename="Regular">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/Semibold/font.ufo" postscriptfontname="SourceSerif4Caption-Semibold" stylename="Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/Bold/font.ufo" postscriptfontname="SourceSerif4Caption-Bold" stylename="Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Caption" filename="Instances/Caption/Black/font.ufo" postscriptfontname="SourceSerif4Caption-Black" stylename="Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/ExtraLight/font.ufo" postscriptfontname="SourceSerif4SmText-ExtraLight" stylename="ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/Light/font.ufo" postscriptfontname="SourceSerif4SmText-Light" stylename="Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/Regular/font.ufo" postscriptfontname="SourceSerif4SmText-Regular" stylename="Regular">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/Semibold/font.ufo" postscriptfontname="SourceSerif4SmText-Semibold" stylename="Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/Bold/font.ufo" postscriptfontname="SourceSerif4SmText-Bold" stylename="Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 SmText" filename="Instances/SmText/Black/font.ufo" postscriptfontname="SourceSerif4SmText-Black" stylename="Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
         <instance familyname="Source Serif 4" filename="Instances/Text/ExtraLight/font.ufo" postscriptfontname="SourceSerif4-ExtraLight" stylename="ExtraLight">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -171,7 +34,6 @@
         <instance familyname="Source Serif 4" filename="Instances/Text/Light/font.ufo" postscriptfontname="SourceSerif4-Light" stylename="Light">
             <location>
                 <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -179,7 +41,6 @@
         <instance familyname="Source Serif 4" filename="Instances/Text/Regular/font.ufo" postscriptfontname="SourceSerif4-Regular" stylename="Regular">
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -187,7 +48,6 @@
         <instance familyname="Source Serif 4" filename="Instances/Text/Semibold/font.ufo" postscriptfontname="SourceSerif4-Semibold" stylename="Semibold">
             <location>
                 <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -195,7 +55,6 @@
         <instance familyname="Source Serif 4" filename="Instances/Text/Bold/font.ufo" postscriptfontname="SourceSerif4-Bold" stylename="Bold">
             <location>
                 <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -203,103 +62,6 @@
         <instance familyname="Source Serif 4" filename="Instances/Text/Black/font.ufo" postscriptfontname="SourceSerif4-Black" stylename="Black">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/ExtraLight/font.ufo" postscriptfontname="SourceSerif4Subhead-ExtraLight" stylename="ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/Light/font.ufo" postscriptfontname="SourceSerif4Subhead-Light" stylename="Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/Regular/font.ufo" postscriptfontname="SourceSerif4Subhead-Regular" stylename="Regular">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/Semibold/font.ufo" postscriptfontname="SourceSerif4Subhead-Semibold" stylename="Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/Bold/font.ufo" postscriptfontname="SourceSerif4Subhead-Bold" stylename="Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Subhead" filename="Instances/Subhead/Black/font.ufo" postscriptfontname="SourceSerif4Subhead-Black" stylename="Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/ExtraLight/font.ufo" postscriptfontname="SourceSerif4Display-ExtraLight" stylename="ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/Light/font.ufo" postscriptfontname="SourceSerif4Display-Light" stylename="Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/Regular/font.ufo" postscriptfontname="SourceSerif4Display-Regular" stylename="Regular">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/Semibold/font.ufo" postscriptfontname="SourceSerif4Display-Semibold" stylename="Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/Bold/font.ufo" postscriptfontname="SourceSerif4Display-Bold" stylename="Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance familyname="Source Serif 4 Display" filename="Instances/Display/Black/font.ufo" postscriptfontname="SourceSerif4Display-Black" stylename="Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
             <kerning />
             <info />
diff --git a/Roman/SourceSerif4Variable-Roman.designspace b/Roman/SourceSerif4Variable-Roman.designspace
index 42758935a8..beb61337ed 100644
--- a/Roman/SourceSerif4Variable-Roman.designspace
+++ b/Roman/SourceSerif4Variable-Roman.designspace
@@ -9,31 +9,11 @@
             <map input="700" output="823" /> <!-- Bold -->
             <map input="900" output="1000" /><!-- Black -->
         </axis>
-        <axis default="20" maximum="60" minimum="8" name="optical" tag="opsz" />
     </axes>
     <sources>
-        <source filename="Masters/caption/master_0/SourceSerif_c0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_1/SourceSerif_c1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
-        <source filename="Masters/caption/master_2/SourceSerif_c2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-        </source>
         <source filename="Masters/text/master_0/SourceSerif_0.ufo">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source familyname="Source Serif 4 Variable" filename="Masters/text/master_1/SourceSerif_1.ufo">
@@ -41,135 +21,18 @@
             <info copy="1" />
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
         </source>
         <source filename="Masters/text/master_2/SourceSerif_2.ufo">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_0/SourceSerif_d0.ufo">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_1/SourceSerif_d1.ufo">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-        </source>
-        <source filename="Masters/display/master_2/SourceSerif_d2.ufo">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
         </source>
     </sources>
     <instances>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionExtraLight" stylename="Caption ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionLight" stylename="Caption Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionRegular" stylename="Caption">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionSemibold" stylename="Caption Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionBold" stylename="Caption Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-CaptionBlack" stylename="Caption Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="8" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextExtraLight" stylename="SmText ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextLight" stylename="SmText Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextRegular" stylename="SmText">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextSemibold" stylename="SmText Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextBold" stylename="SmText Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SmTextBlack" stylename="SmText Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="16" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
         <instance postscriptfontname="SourceSerif4Variable-ExtraLight" stylename="ExtraLight">
             <location>
                 <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -177,7 +40,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Light" stylename="Light">
             <location>
                 <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -186,7 +48,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Roman" stylename="Regular">
             <location>
                 <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -194,7 +55,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Semibold" stylename="Semibold">
             <location>
                 <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -202,7 +62,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Bold" stylename="Bold">
             <location>
                 <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="20" />
             </location>
             <kerning />
             <info />
@@ -210,103 +69,6 @@
         <instance postscriptfontname="SourceSerif4Variable-Black" stylename="Black">
             <location>
                 <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="20" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadExtraLight" stylename="Subhead ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadLight" stylename="Subhead Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadRegular" stylename="Subhead">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadSemibold" stylename="Subhead Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadBold" stylename="Subhead Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-SubheadBlack" stylename="Subhead Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="32" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayExtraLight" stylename="Display ExtraLight">
-            <location>
-                <dimension name="weight" xvalue="0" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayLight" stylename="Display Light">
-            <location>
-                <dimension name="weight" xvalue="145" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayRegular" stylename="Display">
-            <location>
-                <dimension name="weight" xvalue="394" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplaySemibold" stylename="Display Semibold">
-            <location>
-                <dimension name="weight" xvalue="594" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayBold" stylename="Display Bold">
-            <location>
-                <dimension name="weight" xvalue="823" />
-                <dimension name="optical" xvalue="60" />
-            </location>
-            <kerning />
-            <info />
-        </instance>
-        <instance postscriptfontname="SourceSerif4Variable-DisplayBlack" stylename="Display Black">
-            <location>
-                <dimension name="weight" xvalue="1000" />
-                <dimension name="optical" xvalue="60" />
             </location>
             <kerning />
             <info />
diff --git a/familyOS2.fea b/familyOS2.fea
index f97901edbd..3dc832e2f5 100644
--- a/familyOS2.fea
+++ b/familyOS2.fea
@@ -1,8 +1,8 @@
-TypoAscender 1036;  # Must be the same on all fonts for cross-platform consistency
-TypoDescender -335; # Must be the same on all fonts for cross-platform consistency
+TypoAscender 950;  # Must be the same on all fonts for cross-platform consistency
+TypoDescender -250; # Must be the same on all fonts for cross-platform consistency
 TypoLineGap 0;      # Must be zero for cross-platform consistency
-winAscent 1036;     # Must be the same on all fonts for cross-weight consistency
-winDescent 335;     # Must be the same on all fonts for cross-weight consistency
+winAscent 950;     # Must be the same on all fonts for cross-weight consistency
+winDescent 250;     # Must be the same on all fonts for cross-weight consistency
 CapHeight 670;
 WidthClass 5;       # Medium (normal)
 Vendor "ADBO";
diff --git a/familyTables.fea b/familyTables.fea
index 59b6c4a410..5353acdac1 100644
--- a/familyTables.fea
+++ b/familyTables.fea
@@ -4,8 +4,8 @@ table head {
 
 
 table hhea {
-	Ascender 1036;		# Must match OS/2.winAscent for cross-platform consistency
-	Descender -335;		# Must match OS/2.winDescent for cross-platform consistency
+	Ascender 950;		# Must match OS/2.winAscent for cross-platform consistency
+	Descender -250;		# Must match OS/2.winDescent for cross-platform consistency
 	LineGap 0;			# Must be zero for cross-platform consistency
 } hhea;