http://www.extremefightingmachines.co.uk/cgi-bin/discus/show.cgi?tpc=9&post=23285#POST23285http://www.extremefightingmachines.c...pc=9&post=2328 5#POST23285

750W at 24V is only 31.25 Amps. If you have a big gear ratio then the 70s will be fine but your robot will be slow. On the other hand if you uses a small gear ratio then the motor will be doing more work during acceleration and will most likely need the extra amps. Both are very similair but we went for the 120s to be safe and they are supoposed to be more reliable as they are not stressed as much with the same motor.

Ive adjusted the Pro 120s currnt limit down to 70 Amps for drive anyway, purely to prolong battery life and to give better protection during stall.