I found a good channel called Chronova Engineering who made a few videos about machining the mechanisms by hand. They use a couple of off the shelf parts like t

I found a good channel called Chronova Engineering who made a few videos about machining the mechanisms by hand. They use a couple of off the shelf parts like tiny ball bearings for the demonstrator (instead of jewels), but almost everything else is hand-turned. https://youtu.be/P7SlhdJp5qE?si=wSsz26SdgOKQqGBW https://youtu.be/P7SlhdJp5qE?si=wSsz26SdgOKQqGBW