I purchased an Ender 3 and started making bits. At first I was using blender, but eventually I tried several other options, including SCAD and FreeCad. I like SCAD but I am not a fan of the syntax. I toyed with the idea of what I'd like the syntax to be but couldn't come up with something that I liked. I think I actually want something more functional and less object oriented maybe... not sure. If I experiment with this more I will update this site (hopefully) with it.