In RC planes with many engines differential thrust is relatively common (when you have 2 engines you mix the input signal from the yaw stick with the input sign

In RC planes with many engines differential thrust is relatively common (when you have 2 engines you mix the input signal from the yaw stick with the input signal from the throttle so that the the engine on the outside of the turn gives more thrust and the engine on the inside of the turn slows down - and the plane turns better). It's pretty intuitive when set up with good coefficients. Just feels as if the plane has bigger steering surface. Maybe they could have done the same with breaking - just use the steering wheel position to choose the breaking power split between the wheels.