I got a late start, so I only got the baggage ribs and some of seat ribs prepped and primed. I did one of the corner ribs, then noticed that they won't be completely drilled until fitting the side skins, so I'm going to wait.
All baggage ribs and some seat ribs with faying surfaces primed.
The seat ribs and miscellaneous center fuselage parts yet to be prepped and primed.