1. Continued filling and sanding on the R elevator. 2. Ran a tap through the small ClickBond nutplates that attach the empennage fairings and tail access plates. Attached both access plates. 3. Used a ball-end Dremel bit to smooth out the small areas of flox filler I'd added long ago in the aftmost tail bulkhead. Cleaned and masked the area, then shot some primer on it.