It doesn't matter what engine you have in the airplane if it needs nose weight to balance anyway. Even with the G-23, I added about 6 oz. to get it to balance at close to 25% of the mean chord. I then took some of the weight out of the nose and the problem didn't change. What I think I'll do is add some more nose weight to the aircraft, get it positively nose heavy. If the problem persist, then I'll remove weight gradually to see if the problem deminishes. Right now, it doesn'e take much up elevator to cause it to drop the right wing.... always the right wing.
One thing I didn't mention is that I can slow the plane down, add power, gradually adding in up elevator and it will fly dumping air on one wing and then the other. This has me confused because if it were too heavy or had a warped wing, it would snap out of this type of flying.
The servos on each elevator half are exactly the same and the two elevator halves are tied together with a wire yoke. I have pressure tested both elevator halves to see if I have a differential in the elevator throw and it doesn't seem to exist.
I'll keep trying the next time I go out and fly it.