.....and trimming the ailerons while in flight to the right did not correct it? If you are trimmed all the way to the right, and still can't get it trimmed out then you will need to readjust the linkage either at the servo, or at the control surface. I would also suggest you do a lateral balance check, but I would doubt isf the Plane is off that far lateraly. Also be sure you are getting your wing good and centered on the fuselage. I usually put a couple permanet marker marks on the top of the wing that marks dead center so you get it on the same evereytime if using rubber bands.