I forgor to post here yesterday.

My cop out is that my other website went live, my Github repo got flipped public.

The extension I made is a library of primitives for mechanisms in Blender3D. My other website links to it here: https://lettvce.com/bmech/. The Github repository is here: https://github.com/lettvce/bmech/releases/tag/v1.0.1

I did make a model and publish it on MakerWorld also. I made a set of screw jacks.