So I just installed the 20T pinion and once I got it into place, I was playing with the belts. I found that although they are rubbing on the motor, they aren't adding any tension to them. Ran it around for a few mintues and temps seems to be about 15-20 degrees lower that with the 24T pinion. Still going to get the 93T spur gear though. I'm sure at that point I'll have great temps and more than enough torque to throw this thing around.