E-bike gearbox CAD files

I’ve been fascinated with gearboxes for ebikes ever since I saw thuds 2 speed gearbox posted on here years ago. Some other ones that come to mind are the beautiful 2 speed built by a guy named coppersnot using all CNC made parts and another retro-direct prototype that used one way clutches. Also seen that recently there’s been some work using cyclodial reduction units. I’m taking a community college course on CNC machining and have a HAAS CNC 3+2 axis mill and a 2D lathe that I’d like to use to try and build something just as proof of concept using aluminum and steel. Are there any open source CAD files out there for any ebike sized transmissions out there? Any members have something there working on designing that I can prototype for them?

Been years since I prowled these forums, but I’m glad to be back


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There are some more recent projects that may have cad files available; I think they are cycloidal types. I can't remember who made them, but they are probably in this list:

https://endless-sphere.com/forums/search.php?keywords=gearbox*&terms=all&author=&sc=1&sf=titleonly&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search

or this one (which has way more hits but titles should show what's relevant)
https://endless-sphere.com/forums/search.php?keywords=gearbox*&terms=all&author=&sc=1&sf=firstpost&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search