Think that's how you spell it. Well, my dad was trying to explain how it is put together. Well he said that the inner part of the wing is cut at an angle, and when you glue them together then you have the dihedrial. I'm sure I can find someone here that has a close up picture that they could show me on how it works. Thanks Alot...........I'm not buildin anything right now with the dihedrial except a Kadet Senior a guy gave me for free. But, I just wanted to know so when I get to that part then I'll know. Actually it might be that he has already cut all of that out because the wings look to me like they are done. Well, thanks again. Also, any thoughts about the Something' Extra or the 4*40 or 60? Thanks Alot again.................