I finally made the decision yesterday and went to a four bolt system to secure the wings. The primary reason is the ability to change the incidence easily after flying it by opening the holes in the fuse and bonding on new "donuts". I did mine by putting 1/4 inch poplar on the inside of the root rib and then tapping it for a 1/4 - 20 nylon thumb screw type bolt. I'll probably add anti rotation pins after I know the incidence is right just to aid in assembly of the plane.