Clecoed Aft Baggage Floor and Rear Baggage Shelf in place. Clecoed the Attach Plates on F-862-1 Rear Baggage Bulkhead and final-drilled. Not sure why this step is in here, but it is done. Final-drilled Aft Baggage Floor, Rear Baggage Shelf, Left Seat Floor, and Right Seat Floor. Tried to temorarily mount the F-837-1 Aft Control Mount, and found the wrong platenuts were installed at the Van's Factory. Replaced with correct platenuts, temporarily mounted Aft Control Mount, and match-drilled IAW Van's Construction Manual.