Tonight I finished riveting the root ribs to the attach angles and finished the installation of the root rib. I had to fabricate a couple angle spacers for the rear spar attachment plate bolts. When I was installing the bolts for the main spar I had a little problem getting the socket on the bolts closest to the spar caps. I ended up having to drill out a couple rivets on the bottom of the reinforcement angle to be able to tighten the bolts.