Cleco VS-803PP to VS-808PP, VS-410PP, VS-411PP and VS-412PP together. Rivet the rear spar together Rivet VS-704, VS-705, VS-706 and VS-707 ribs to the front spar. Cleco on the VS-801PP / VS-901 skin. Rivet on the skin. Cleco on the rear spar assembly and install the remaining rivets along the rear spar and end ribs Blind rivet the rear spar assembly to VS-707.