Hello, Where can I find files not modified for 3D printing? I'm going to be printing a large majority of the arm, with some parts being machined out of aluminum at my machine shop. More specifically the main arm (J2 Arm) that's too big for my printer (even when split in two) and the J4 Main Shaft will likely be machined. I appreciate any help in advance! And if I'm just dumb and don't see it somewhere, please let me know I can be blind sometimes :)

I want to use this arm to auto punch holes into small parts using a bench press. I'm going to need to design a magazine system to hold and dispense the parts and another system to push down the foot pedal of the machine, each needing its own motor/servo/cylinoid or whatever I choose to use. my question is, is it possible to be able to connect those extra parts into the arms brain to let that adrino run it on the same program? (with extra programing of course) and if so, how difficult would it be? any help would be greatly appreciated! Thanks in advance!