I use to use 3M-77 adhesive to sheet the wings, but have been told that 3M has changed the formula and this stuff now eats the foam. Does anyone know if this is true? I heard Gorilla Glue works good also.
Any info on these two questions?

It's the propellent that attacks non-EPP foam. Go to JoAnne's fabric store (or similar place) and get the Reitz brand of spray adhesive and it will not use acetone as part of the propellent.

Fly safe, Glover

I like to use just regular Elmers wood glue. Don't have to worry about the foam getting messed up. Just my two cents. Good luck

Just a tip - I found SUMO glue from Locktite, it is a PU glue like Gorrila but expands 75% less.

Duck brand vinyl flooring tape is double sided and doesn't weigh anything. After curing overnight, it sticks like iron. I got mine at Lowe's.

Epoxy.