Originally Posted by Wanderer77

I am running MM3 with a Tekin Redline Gen2 motor and RS Gen 2 ESC. I was able to reverse the rotation of my motor using the Tekin Hotwire app. I'm not sure how many other sensored systems will support this, but Tekin does.

If you can't reverse your motor, then fredswain is correct...you flip the assembly of the gearbox and the end of the motor can sits on the opposite side.