Locking the revo in 2nd gear to use motor braking/reverse

[zeropointbug]

If anyone is interested, I used a piece of traxxas driveshafts (female) and cut a chunk to put between the shifting dog and the other gear (the keyed part of the output shat). Second gear is always engaged this way, and I just used a 4mm screw and threaded into the dog shaft input on the tranny to prevent dirt from entering.