I've opted to go ahead and do a more permanent install on all of the wing bolts. I found that when I install the engine's coils, it will be nearly impossible to get at anything located inside the spar. I made an oops when I put the retaining screw hole at the opposite end of the C-Channel. The bolt could easily be pushed into the spar had I done that. I will fill the hole in the spar and all will be well. I placed the retaining screw in the center which makes a lot more sense. It took a friend down the street and I to assemble them into the spar. Now I can look forward to the EASE of just 1 wrench to put these wings on. Thank you GOD!