Thanks, Jack. When I started building the kit, the intended purpose was to have a nice scale "everyday" flyer and to build as quickly as possible. Well, I did finish in 8 months, which is fast for me...but there are just so many fascinating scale features on an SE5a just screaming to be modeled (lacing, riveted metal panels, aldus sight, etc.) that I just couldn't resist.
On your question, I'm not sure. It may be that the unequal dihedral resulted from my attempts to "pull up" the leading edge with the forward landing wire. I plan to remove the port wires one at a time and see if I can straighten things out with a minimum of effort.