I tried something different. As much as I like the idea of the speed control, I decided to just make something that works. If I like the hobby enough, I'll probably just buy a commercial lathe. But fear not! I'm still building my own.

This new version is very different and lacks the defining feature of this project(electronic speed control), so I wrote it up as a separate project here: https://hackaday.io/project/7408-a-simpler-cheaper-lathe

Enjoy.