[Sammus]

I saw a water cooled t-maxx once, with a mini radiator and watercooled engine head on a nitro motor, with a mini reservoir and pump and everything lol.

I think 38mph is too fast for a feigao, especially a 7xl (I assume your running lower V than most).

I run an 11XL on 7s A123 at the moment, geared for 35mph and i cant get it too hot. Even out at the sand dunes, big open runs pushing through soft sand I think is about as hard on em as it gets. I do have a 2 speed though which probably helps... (revo 3.3 conversion). Won't stop me getting a MMM/neu combo though :P