Thanks for the condolances.

I use a very long level and run it down the TE of the wing. Also, look down the top/bottom of the wing from wing center to wing tip. Sight down the wing like you are aiming a gun. You can see warps or twists that way as well.

There will always be some minor imperfections or inconsistancies. It will be pretty obvious if it is not right.

I'm being a lot more picky with my wing because I want to compete in entry level (Sportsman) pattern with it, plus this airplane deserves the extra attention. For me, it NEEDS to fly straight at neutral for best performance. Other people don't concern themselves so much with it because it can be trimmed out (most times) to fly straight and level. Although, if you have to adjust in one area, it will most certainly affect another area.

Sometimes you can pull a twist out of a wing by shrinking the covering material in a way it will work in your favor.

I hope that helps.

Brian