RE: Aircraft rolls with up elevator
As the last post stated, check the pitch of the motor, that's the first thing that jumped out at me considering you are having to trim it differently based upon how fast you are flying. I take it when you are just gliding, it requires yet more trim to keep straight and level right? Get some serious altitude, do a powered dive, chop the power and pull straight up, you likely are going to stall the plane, but might get a loop out of it, that will difinitavely tell you if it's a control surface problem, or a power setup problem.