drdoom, With a .61 you are'nt going to have any shortage in power! I fly mine with a .40LA, alittle anemic but it flies. Great flying sport plane. I would defanitly build it with the flaps, it is difficult to slow down with out them, all it whants to do is FLY! And they can REALLY shorten up your takeoff.

I have well over 300 flights on mine and I have never had any problums other than the engine. You should have plenty of fun with this plane!