Sounds like a bent wing tube. I would also check to see that the fuse sides are not compresed at the rear edge of the wing and that the formers are still intact near the rear of the cockpit area. I did something sort of similar to my new extra and bent the wing tube. When it bent it did push in one side where the trailing edge of the wing meets the fuse. Easy fix -- carbon wing tube from Tom and a little TLC. Plane has another 50-60 flights since then.