The Somethin' Extra has separate wing halves that are held on to the fuselage by an aluminum joiner and J-hooks (and a dowel). So, you glue them together with nothing at all.

I'd seen that LT-40 thread and almost posted in it saying I was glad I got the SSE as the wing halves are separate and I wouldn't have to worry about gluing them at all. Guess I should have.