I had the sme trouble with my Sequence and finally noited that the holes for the anti-rotaion pin in one wing had been drilled oversized a little so that when I glued in the pin it was at slight angle and changed the incidence of that wing.

I used an incicdence meter (Horizon Hobby) to set it even with the other wing by enlarging the hole in the fuse and using a piece of light ply to secure it.