diff --git a/gridfinity_cup_modules.scad b/gridfinity_cup_modules.scad
index acfcb42..c06a974 100644
--- a/gridfinity_cup_modules.scad
+++ b/gridfinity_cup_modules.scad
@@ -75,7 +75,7 @@ module basic_cup(
   difference() {
     grid_block(num_x, num_y, num_z, magnet_diameter, screw_depth, hole_overhang_remedy=hole_overhang_remedy, half_pitch=half_pitch, box_corner_attachments_only=box_corner_attachments_only);
     color("red") partitioned_cavity(num_x, num_y, num_z, withLabel=withLabel,
-    labelWidth=labelWidth, fingerslide=fingerslide, magnet_diameter=magnet_diameter, 
+    labelWidth=labelWidth, fingerslide=fingerslide, magnet_diameter=magnet_diameter,
     screw_depth=screw_depth, floor_thickness=floor_thickness, wall_thickness=wall_thickness,
     efficient_floor=efficient_floor, separator_positions=separator_positions, lip_style=lip_style);
   }
@@ -289,6 +289,12 @@ module basic_cavity(num_x, num_y, num_z, fingerslide=default_fingerslide,
         tz(3) cornercopy(seventeen-0.5) cylinder(r=1, h=1, $fn=32);
         tz(5-(+2.5-1.15-q)) cornercopy(seventeen) cylinder(r=1.15+q, h=4, $fn=32);
       }
+      
+      // cleanup floor difference overhangs
+      hull()
+      cornercopy(seventeen, num_x, num_y) {
+        tz(floorht) cylinder(d=2.3+2*q, h=2.3+2*q, $fn=24);
+      }
     }
   }
 }