RE: Tower .60 Trainer
Easy way to check for a warped wing, put it on the floor. You should be able to see it pretty well.
I mounted the motor with right thrust. I just measured from the rear of the fuse before the vertical was mounted and made sure that the left prop tip was about 1/4 to 3/8 inch farther. That would give about 3 to 4 degrees right thrust.
You could always put the wing on, measure to the ground from the front and rear of the wing tip to see if there is a warp. Then twist the wing and hit it with the iron or heat gun.
Buzz.