[RC-Monster Mike]

130 is a bit warm for the batteries, but not too terrible. I would be sure to let them rest/cool before running them again, though. You are drawing on the batts pretty good to get them that warm. Possibly a drop ingearing would spare them some agony and allow them to last longer. You could also add two cells and drop a couple teeth on the pinion. You would get similar speed, more power, longer runtimes and cooler batteries.