Used my handy dandy nutplate jig and drilled #40 holes in the F805D brackets, followed by countersinking. Deburred, swabbed primer in the holes and used the pneumatic squeezer to set rivets to attach the nutplates. Used my dremel with cutoff wheel to separate F-830DEF stiffeners , then separated the six F-830C stiffeners. Then I clecoed the left and right floor seats together.