The general consensus is that a regular old forklift motor can take 72V without [quickly] exploding. Is this because of the neutral brush timing? I wonder if you can feed it more V/speed if you advance the brush timing....
I don't think 12 batteries (series/parallel) will fit into an MX-3 without serious imagination. Six batteries probably won't give me my required range. The alternative is just going with as many as I can fit - whether 7, 8, 9, 10....whatever. But that means voltage will have to be higher than 72. I guess with a higher voltage system I can always limit V to the motor.
