Riveted hinge brackets and doubler to the rear spar channel. Riveted the ribs to the rear spar assy. Cleco'd the skin in place and riveted the center rib and front spar to the skin working from the center out. Cleco'd the rear spar assy in place and riveted the spar to the end ribs, the to the skin. Blind riveted the center rib to the rear spar. Vertical spar assembly complete.
