I've thought about doing something similar before!

For the Antikythera Mechanism, you might enjoy this video of someone re-creating it (with a few improvements).

https://youtu.be/mTsCx0E7YkA?si=X6X33n96Y9usI6DO

Clickspring on YouTube also has a series dedicated to a reconstruction of the mechanism. Both are fantastic.

https://www.youtube.com/watch?v=dRXI9KLImC4&list=PLZioPDnFPN...