LeoMakes' most recent video features using a 3D printer to make modular synthesizer parts. He goes over the precision you can expect to get out of these fairly low-cost machines and hints that he might be able to make some interesting "electro-mechanical musical things" with it in future videos. Enjoy.
Decapitator, SIE-Q, Radiator
Lemur and touch
Zebra 2.9 + ZebraHZ and 4000 or so patches
New features, new patches