With all the AC nutplates finally installed, I was able to permanently install the rear floor pans. Got the pans fit in place. Had to file a little off the openings that accept the seat brackets, it was just too tight. Got all of the pull rivets set and then match drilled the holes into the spar. I can't access to deburr these holes so I drilled an undersized hole and reamed to #30. Installed the LP-3s in those holes. What a big day. Finally have a secure place to put my weight in the fuselage. 2/4: got all the bucked rivets except for about 10. I ran out of 4-4 rivets! I finished enough to proceed with the rear seat pans and reinstall the flap motor and torque tubes.