I do feel lucky! Must have fallen out near the end of the flight because I was wringing it out. I can't believe the wing didn't come off.

I checked Lowe's and Home Depot, and all I could find was a single 4mm x 40mm bolt. It didn't match the other one, but it did fit so I could fly today.

I would like to change to a more standard size with nylon bolts. What is the best way to get the old blind nuts out without damaging the wood? I can't really get to the underside because the area is very tight.