acheive zero twist
or as close to it as possible. have you measured this with the skins clecoed on. it may come up to zero if once every thing is nailed down so to speak.. you really dont want to start riveting and notice the holes creeping. take your time do whatever it takes. i do feel that the pre punched kit could be built without any jig and still probally come up pretty darn close as long as all the parts were first clecoed together..but i wouldnt try that with my $$$$$ and dont want you to either. good luck, be steady and be patient its not a race..
