After cleaning out the area under the left rear seat and verifying that it was ready to close, I riveted the nutplates onto the seat and then clecoed it into position. Then I began riveting the baggage floor, starting with the CS4-4 rivets nearest the baggage door opening and working away from there. I put in the AN426 rivets in the aft flange but none of the nutplates yet. You can (barely) see the closed cover for the oxygen fill and ground power in the second photo. I ended with the LP4-3 rivets at the junction of the floor and rear seat.
Rivet count: 108 (0 redo, 530 total redone) Total: 16127 - Plus 549 done at Van's