Since the Op is going to buy a new plane, I will throw my 2 cents in on the third thing you said. Not all trainers are flat wing and not all wings are joined the same way. I folded the wing on a slightly used Avistar with stock .40 la engine because the wing had been joined improperly by who ever built it. I have 2 other Avistars that I bought new and put together myself, one has a Magnum .46 and it will take any amount of G's or high speed aerobatics you can put it thru. I use about 14 rubber bands and I have pulled some full throttle loops where I could see the wing seperate slightly from the fusalage during the pull out. If the Op is looking for a trainer that will perform aerobatics like a sport plane, he might want to re-think the Alpha 40 and get an Avistar.