I don't know if this has ever been posted, but for those new to the hobby. Buy a cheap little pencil sharpener (the little one's that have one to two holes) and put in your flight box. Then when you have to install a new nylon bolt (be it the wing bolt or landing gear), cut it to length and just sharpen the end up a little. It makes inserting the bolts easy as pie. The threads do not get messed up, and your ready to go.