T.W...I reenforced my blind nut plate with 2 small pieces of triangle balsaAfter many hard flights with my baby, that wing bolt plate is still as strong as a rock...neither did I ever had my nylon bolts strip.....I actually retired my bolt some time ago, just to be sure..but that was after many times placing- and removing the bolt...but I do recommend you reenforcing the wing nut plate with a few pieces of triangle balsa, if you have not done already so.....just my .02 my friend...