Calibration failure due to the lack of physical protrusion stopper.

[harumo11]

Hello developers!
Thanks great models!

Take a look following two image.

This is a original mount of so101.

This is the mount include this repository.

I think the this model needs protrusion to stop wrist rotation.
During calibration, the robot rotates each axis from one limit to the other. Physical stoppers typically determine these limits; however, this model appears to lack them.

Could you check the model?

Thanks in advance.