RE: which speed 400
swathdiver thanks for the input ive made my mind up put an order in for speed 400 7.2volt need the torque the only time i give my tanks full boot is up hills so i think it will be o.k. and if it blows the board will look for another type of motor if not alls well thank you everyone for input this is one of the topics that will always be open for debate untill someone finds the full answer.
best regards pete