After staring at these drives on my desk (for years), I have made the foolish decision to try and recreate them for my own enjoyment. This is my decent into madness, an account of my journey/personal project, and my big adventure with FOSS! 
It started with some good tequila and nist calipers! 
I know absolutely nothing about freecad but what I have found out so far its difficult. I am not going to lie here its very hard to use and even more so if your dumb like me The full concession is I used a local language model that I downloaded and fed it the user manual because I cant concentrate at all… This got me through most of the hurdles I had.
So i started measuring and drawing and measuring. I used a couple of different pairs to try and get an understanding of what kind of tolerances I would be looking at. I went and got a bambu printer because my ender was hurting my soul. This led to a side quest of 3d printing and learning of which I am just learning to walk.
There was one hurdle that I still struggle with today and that’s TNP. Which is the Topological Naming Problem. So to navigate that I broke down all the operations and documented the order in which I do them to avoid collisions and allow myself to go back make a change and then another step forward… 
I have machined things in the past (long time ago) so I am fairly certain I can relearn things. But being an operator is one thing, designing the tool-paths is another. So there will be alot of rediscovery and new concepts learned.
This is a long term project and its going quite slowly I will try to not bore you to death. There will probably be different phases where I rewind motors and expand on the implementation. For this project I chose 6364 from trampa for the conversion but its not 1:1. The original implement is also based on SK style motors so I am going that route.
Thanks for checking it out gang! Hoping to get the openbuilds up soon.
