Hi Coronabob...
My english is not very good, but i'll give it a try...
- One plastic nut for each wing is ok, the other one is a spare. If you wanna use 2 for each wing, no prob...
- Put some microwave oven foil on the fuse. Apply some silicone on the inside of the wing where it meets the fuse and put the wing on the fuse. Let it dry. Remove the foil.
- Sounds like you have some space between wingtube and the wing. Just put some clear tape around the wingtube, just enough until your wing fits tight around the tube.
- I've put some plywood between the gears. But if you have a really hard landing, it'll break too...just try to land smoothly

- A DL-50? Isn't that a chinese DA-50...should work... About the servo's, i prefer a hs5985 all around. The control surfaces are quite big. You don't wanna have flutter, it'll just tear off the wing...ask Bart [sm=omg_smile.gif]
Although the new C-arf extra 300 2.12m is the better version of the 2x2, you will enjoy this one!
Gr Gaaaz