[lincpimp]

Stock revo has a reverse gear setup in the tranny. When you converted it with the foc (foeward only conversion) it eliminates the servo actuated reverse. Most people remove reverse due to the weak gears. So you can either use mech brakes on the 3rd channel and no reverse, or use motor brakes (you can so that since your tranny is locked in 2nd) and have reverse.