I've soldered my caps on the MM, broken in the motor, went out and bought the right size allen so I wouldn't strip the grub screw.
When I install the pinion on the shaft, and I'm looking at the truck from the rear, the pinion only contacts the right side of the spur gear, maybe about 33%.
Is this right? I can't move the pinion gear any further down the shaft...it's as far as it can be so the grub screw still contacts the flat part of the shaft.
*Ahem* It seems to fit much better when it's not installed backwards. :-)