[redshift]

The motor mount was done knowing what I wanted to do for a chassis, obviously. :) And at that point I had a CC 1520 in mind. The idea of that motor hanging on two 3mm screws didn't sit well with me, so all four holes would be used. That's why the screw slots in the motor mount are so long.

I found where the pinion (RCM of course!) would sit on the shaft and made a ball divit with a diamond ball burr. I consider this a must to not have issues with the pinion. A tiny amount of red Loctite on the pinion setcrew, and it's trouble-free.