4wd will have advantages on that setup, 720 wheel span quite badly when setting of on full throttle, so at least c3 will be able to accelerate reliably, Also, should he want to run the robot at normal events, the weapon can be removed and replaced with a wedge or whatever and it would be a real good pusher.

Also due to the gyroscopic forces involved, and the weight distribution it should handle really well having similar characteristics to razer/720... where by it will turn around the front wheels giving maximum control.

Theres a couple of refinements to be done in the chassis, but I think this will be a strong contender for next years title.