That plane, with a 960 sq in wing, doesn't have the wing area to handle 11 or 12lb or do 3D well. It's too small, plain and simple. It needs to stay well under 10lbs? Not saying it won't fly, it will. Either of those engines will toss it around like the proverbial rag doll. But, with a 30 in it, it's a snap happy handful. Been there.... lesson learned. DLE 30 at 11lbs .....