Well, I tried the thunderpower 3s 1320 yesterday, and even with the endpoint set at 70% the stock motor burned out in 2 minutes. I went to my LHS and got a E-flite eflm100, a speed 400 w/ 1.85:1 gears and 8x4 prop. It was the best thing they had, but I wonder if it would be better to find one with lower gears with a bigger prop.