RE: How many wing bolts?
I have had the bolts shear when a wing clipped something on the ground. Saved me from doing repairs to the fuse, and lessened the damage done to the wing had it been metal bolts. I also use them for my main landing gears, and one time when I mis judged a landing and hit the dirt, it sheared the LG off and saved the plane from some serious damage. Much easier to replace 4 bolts than the underbelly of a fuse.