I have both these planes. The Monocoupe has a saito 180 and an APC 18X6 prop. It will perform standard aerobatic manuevers quite well. I am not a 3D flier so I can't comment on that. I have a 26 cc engine in the GB-Y and am satisfied with the scale performance a 32 or 40 cc engine on this plane would probably be more satisfying and would certainly help with balancing the plane.