Originally Posted by Chris Jarosz

I would think by flipping the motor you would actually lose more air control. I've never tried it, so I cant comment much further. Oh and the motor rotation direction is the same as a Durango buggy built with 3 gear transmission, not 4.

However, if you were to add and idler gear in the rear diff, you would either have to add one to the front, or figure out a way to add the rear one between the pinion and spur as your belt would run backward if not.