Back when I built my flaps and ailerons I remember that getting them twist-free was something of a challenge. As I recall, part of the trouble was finding a table that was perfectly free of warps and twists. It turns out now, that for reasons unrelated to this, I am having to build a new set of flaps and am not looking forward to this problem again. What I really want is not so much a straight table, but a straight board of some type that could easily be clamped to the flap. I'm picturing somethink the same size as the flap, like a bookshelf, but very rigid and straight. Anybody got ideas on what could be used? C'mon all you engineering types, what've ya got?? ![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)