I did glass the wing with .4 oz glass and after the epoxy was fully set then I installed the nacells.

Each nacell was tac glued with thick ca to get the exact position, then I used 2 oz glas to cover all joints both INSIDE and outside the nacell.

CAUTION. be sure to scruff sand the fiberglas parts before you glass them. They really do have mold release agent and the glass won't stick.

I thought about stringers into the wing,, but I took a chance and only used the glass over the nacell area and wing. There was about 1" overlap with the wing and nacell. I also glassed the inside of the nacell at the extreme rearward position by mixing resin with small pieces of glass and then using a screw driver pushed it all the way back to the smallest area.

After 31 flights I have had no issue with the nacells, but I do check regularly.

Happy flying. Jim

PS>. I installed the 1/4 scale 120 oz servo in the rudder. The only thing that protrudes from the rudder is the ends of the servo arm. Then I used 4x40 threaded rods in a pull pull set up to control the rudder. I know this is overkill, but I wanted to be sure I had enough rudder in the event of engine failure. I have flown 2 approaches with 1 engine out due to fuel problems with no rudder control problems.