[greencactus3]

i highly reccomend shortening your wheelbase or widening the track or using less grippy tires. you would have trouble turning iwth that setup. and i highly reccomend you learning how to use "Reinforcements" to make a stronger. more reliable robot with less weight. beam on beam on plate only works for so long.
and as for max amps from a rcx, do keep in mind its possible to use battery boxes and use an rcx to change the switches. doesnt drain the rcx batteries as fast either. have fun!