The kadet airframe is weak, comparibly. It is stick built, which makes it inherently weaker than sheeted planes. It's designed light for smaller engines. It is listed as a 40 sized plane for a reason. I don't have any problem overpowering models--I do it myself. However, I've heard lots of overpowered kadets that flutter like there is no tomorrow. Not a good thing! I'm glad you like them, so do I. They have a place and a purpose--hanging a big engine on the front and flying 65 plus MPH is not their place or purpose. I'm just trying to save the guy some grief. He can make his own decision independent upon what I or others (including yourself) think.