I'm building my first RC plane (BUSA Smoothie) and am nearly finished. Before I cover it I decided to check out a few things, the first being how the wing mounts to the fuselage. The kit has two nylon bolts going through the TE into a 1/4" hardwood peice. I used thin CA to strengthen the threads, but I'm wondering about using some type of blind nut. Additonally, the head of the bolts dig into the TE a little bit when tightening, should I use a metal washer to prevent this?