I ran a full battery through and made a small hill to crawl on, along with the tensioned tracks, and the results were the high side of OK @ 160F on the motors and 135F on the RX18.
there is really no where for the air to go in there. but a fan might help yea I'll have to try it. Interestingly the tank became a lot more controllable at the end of the battery life or maybe I'm just getting used to it.
I started at 8.4 and ended at 7.3 the tank still wanted to run though, and still had a lot of speed.

Unfortunatly the airsoft fun doesn't fire anymore, no sound or recoil from it. I doubt its the board since it shows no signs of trouble. but maybe I pulled wires loose from turret side.. I don't really NEED it to shoot but something to fix. it still traverses fine.