Engine is straight ahead as per the book.

❍ 6. Measure the distance from the spinner backplate to the
firewall. It should be 5-1/2" [140mm] on both sides of the
spinner backplate.

I am using an OS 65LA with a Xoar 12 x 6
Do you think a little right thrust would help? Say around three degrees perhaps?

I agree the wing could be warped slightly. Guess it's time to get out the iron. I can't see any warp looking at the wing, guess I'll need the straight edge too.

Thanks Bob