I recently purchased a airplane that one of the blind nuts had fell out of the wing. It was the one used to bolt the wing to the fuselage. So, I took a piece of nylon cord, about 200lb test, and a 1/2" flat washer. I dropped the nylon cord through the hole into the wing where the blind nut is suppose to fit. I fished the cord out through one of the vent holes and placed the blind nut on it with the teeth in the direction they needed to be. I then tied the 1/2' flat washer to my cord. I eased the cord up until the blind nut was snug to the wing panel. I made sure it was lined up with the hole and pulled it just hard enough to get the blind nut to stick into the wood. I then eased the string and washer back out and put the wing bolt in and tightened it up to pull the blind nut into the wood. After that I carefully let some thin ca run down to the blind nut to make sure it did not come loose again. Walla, job done and ready to go.