Last I talked to duane, he said the last guy that put a moki 150 on the agcat had hell taking off because of the torque the engine produced. He sold it and the guy that bought it put a g62 on it and it flew fine. I am gonna have to give duane a call soon because I crashed my 502 that flew at top gun this year and I want to order another. I think the evolution 77 or 99 radial radial would be a better option and more scale looking. I have to finish a corsair I been building for three years then I will decide if I will build the agcat from the plans I have or buy Duane's.