[lincpimp]

I have a feeling that Mike's slipperential will help with pinion/spur issues, and drivetrain shock on landing. On the mech brakes issue, motor brakes do work reasonably well, but hard braking does cause the weight to shift over the front wheels, thus unloading the rears, and thus the diff, limiting braking. The hybrid setup with rear brakes, and motor braking sounds the best, but I would prefer to use the slipperential center diff before realy racing hard...