almost done cad! figured out the motion of the arms, which is with a bunch of bearings and dreams. i found out people in the real world dont actually use hex shafts but im going to stay in my fake world as long as possible so i will custom 3d print some hex shafts to work. the assembly works, and the motion all makes sense. whats left is to redo the arm part with shaft collars because those are kinda necessary, create a shorter hex shaft, create a proper stand, fix the rack and pinion relation, and then i can finally think about the electronics.