The only thing that could make our DD407 model better is to add our new high amperage relay kit. A 120 AMP 6V relay mounted only 6" from the alligator clips guarantees every last ounce of power from the track reaches your car.
This controller has a dual polarity and will handle any car up to a G7. This is the version that you want if you want the pro brake rheostat but do not need the relay.
DIFALCO - DIF280 - GENESIS 2 HD30 ECON BRAKE AND TRACTION CONTROL (slot car)