The right wing will drop then it will just yawl. I try to keep the loop round but it is a little short in the last 90 degrees. When I do the loop I'm holding a small amount of up elevator then relaxing it slightly as the plane is about to be horizontal again. The power level is about half power threw out the loop reducing slightly on the way down. I can't remember which way the wing twist was, positive or negative, but it is a very small amount. One person suggested that I try to install some electric tape turbulators and I think I might try this since it is a simple thing to do. The weather is getting in Indiana so I'll have to wait for a nicer day.