I had a balsa USA stick 40 for many years, since the eighties. Wore out a bushed Enya .35 engine with it. retired it and resurrected it two times. the last time I modified the wing saddle for a Avistar .40 wing and had a Como .40 in it. the original wing did not have ailerons. and the Avistar wing was semi symmetrical and did have ailerons. Let the daughter fly, and ,lets just say she was one of those " push the sticks to the corners when you are in trouble" people so when I had the transmitter back, well, you don't pull back to go up when inverted. The demise of my planes always ends up with broken peaces and splintered balsa to take home.