Tom,
I was unable to determine if you are nuts from this brief post. However your friend has no reason to hate you for the argument. I agree with you that changing one aileron won't fix his problem.

You didn't mention the skill level of this "friend" of yours. It took me quite a while before I learned to make a loop that came out in the right direction. I was convinced my Four Star couldn't loop properly until I finally figure it out. A little extra speed and getting the wings perfectly level before starting was my solution.

BTW, I'm one of the guys that doesn't trim planes. I just move the sticks to make it go. I've always felt that with all the corrections needed for wind gusts and such, it doesn't need to be perfect. Of course you pattern guys don't need to worry about me winning any contests.

Tom