There were gaps in the nacell to the wing. I ca'ed the nacell's just to hold them in place. Then I used 2" 4 oz glass strip and epoxy to seal the outside of the nacell. This gave about 1" on each surface. Then internal to the nacell I added 1" glas that was pre wet with epoxy inside of the nacell to add an internal bond. BE SURE TO CLEAN THE NACELL AND ROUGH UP THE SURFACT to make sure it bonds with the epoxy. There really is a mold release agent on the nacell you can't see and it will prevent a solid bond to the wing.

Hope this helps.. Jim