Uncouth:

Ten pounds is right on my limit for nylon. I use stainless screws, though, much easier to find than aluminum. Never had them come loose, but check them between flights anyway. Plain steel would be OK, but I like the looks of stainless.

My Ultra Stick 120 has four wing screws, I figure on a max of 16 G rating. That puts 60 lbs load on each of the four. IF the load were even front to back and side to side, the nylon would be fine. The loads are never even. Stainless steel.

When the wing screws break,
. Fuselage becomes a tomato stake.

Bill.