Wayne, my wings although a bit buckled & rusted in corners were remarkably good. I replaced the locker lids which were a bit dented. The NOS replacements were of a later type. The discerning eye can identify that because on the hasp hinge the ratio of hasp width in the hinge itself to locker portion of the hinge changed making it less likely to fracture at the hinge. But with practice you can spot the difference.
The main portion of the wing should be easier to fabricate than the lockers. What you have to watch is that the locker hole has an everted lip to reduce water ingress. Never likely to be entirely successful in that the locker has a drain hole.
The main underneath ribbing for the wing is provided by two U channels spot welded on. On the Mk 1 it is cruciform & you will usually see this pattern from hollowing on the top where people have stood on the wings. Mk 2 had the same up to the point that a replacement was needed, with no locker it is a slightly thicker material & the two channels run parallel. You can see this on the left of the third picture.
The gubbins pieces supporting the lockers are a nightmare, but there are some usable/patterns here.
