I did a bit more jumping around today. I finished riveting the flanges on the two passenger seat floor panels. I then installed a few nutplates and cleaned, deburred and drilled the two rear cover panels. I fit and drilled the seatback brace closeout. I have to decide on a location for the O2 filler port. I initially thought I would incorporate it into the seatback brace where it can be out of the way of baggage but still accessible for O2 filling. After further contemplation, I decided to do a bit more investigating on what others have done. Lastly, I cleaned and deburred various panel closeout pieces to include the baggage bulkhead.