I'm converting a Nitro XTM Mammoth with a 2 speed center diff to brushless and I need a little help. The truck is fast with the brushless motor, but because of the one way sprag on the center diff (locks one way but spins freely in reverse) I cant use the motor/esc for brakes or reverse. I read about using a mixer?? to operate the mechanical brakes, but everything comes up for heli's so I'm a bit confused there. Any help, info, or ideas are appreciated. Thanks.