A few more pics for those interested:
The center diff. A neat thing is that the bearing fits over the outdrive. I can't tell you how many times I put a diff together only to forget to put the bearing on! Arrrgg! You can also see how the spur is shaped. You can also see how the diff mount (left one) has a spacer. The bearing dimensions are 18mm OD, 12mm ID, and 4mm thick:
A shot showing the differences in pitch between Mod1.0 and 32p/Mod0.8:
And a shot showing how much room there is on this thing, even with a large motor and battery. The battery is sitting against the dirt guard, but not on it. You can also see how the dirt guard mounting screw would interfere with the motor. So, the motor will have to be raised a bit:
