Nema 17 Stepper 5:1 Planetary Reducer

This is still a bit of a work in progress but I think it's mostly workable now.

Warning! There be overhangs here!

I have yet to see what sort of torque this can handle but it seems like it will handle quite a bit. I'm able to stop it if I grab two of the screws sticking out of the planet carrier. Hopefully I'll measure the torque soon.

This is intended to be used with another bearing somewhere on the output shaft. I can't imagine that it would handle any load with only one bearing o