I'm building one to, slowly. Been working on my car. One person suggested using triangle stock on the LE of the ailerons so you don't have to bevel them. Sounds like a plan to me. I also used Poly glue and ziplock bags of lead hunting shot to sheet the wings. Worked super good. Have to wipe the poly off as it dries and foams though. Also they suggest building flush with the rib just inside the wing root. I just trimmed the overhang, easier. Also Sig suggested trimming the sheeting stock with a straight edge to straighten it. Mine was straighter before trimming.. Another thing is the sheer webs. To trim them in place between the ribs is a PIA in my oppinion. I just glued them to the face of the ribs. Seems pretty strong and super easy to do.