I just put my first flights on the Giles. I have a Y.S. 140fz and have enough power to pull out. The plane flies very well. It will Knife edge very well with little coupling. Once I move the cg back it should eliminate the coupling. I have to add some more right thrust. and move the cg back a little. For $250.00 it is well worth the money. The quality is on par with my Great Planes Patty. I can't believe how it flew actually. It will pop right up into a hover from slow speeds without dipping a wing. TQ rolls were easy to control.