Thanks 8178. I"ve tried several methods of cutting parts over the years and using Super 77 to attach paper patterns directly to the balsa is the easiest and most accurate for me. A bit of thinner brushed on the paper instantly releases it from the wood.

I'm going to laminate the 1/2" x 1" LE from two 1/4" x 1" strips. This will be a bit stronger and a bit more warp resistant. The UFO wing is very minimal in its construction. There are no shear webs and no dihedral braces, and the spars are balsa, not spruce. I will certainly strengthen the area that supports the retract mounting plate; no ply doublers are shown on the plan (they're shown for the fixed gear blocks only). One idea I'm thinking about is to go ahead and sheet the entire wing and then glass it, which makes sense to me. It would probably create a nicer finish, too.

Here's a section of the plans. Note the instructions about joining the wing halves.