Tonight I made a start on rivetting the seat rib sub-assembly. I got the bulkhead and the right-side forward inboard seat rib done. One thing I did find was that the callout for the seat rib angle to inboard seat ribs is for AN470AD4-4 rivets. Well, I squeezed one and decided it was too short. However, a -5 was too long and would surely have tipped over. The answer for a slightly better spec'd rivet was to cut a -5 down to a -4.5 (-ish). These then set much better and I was much happier with them, though of course it took significantly longer.
Seat rib sub-assembly bulkhead
Forward inboard rib, angle and seatbelt/vent bracket
