1.8 hrs, 42 rivets.
A major milestone passed. My guess is I'm 2/3 done with the airframe. Still bunch of rivets in the finishing parts, but not enough to get to 20K.
Finished riveting 916 ribs to the 904 aft bulkhead. Had to use the gun for these, and it took one rivet to find the right set and get the method down. I won't show the picture of that first rivet.
Started riveting seat and baggage ribs to the 905 bulkhead. Got the 6 ribs that stand alone done. Now to finish the seat/bulkhead/baggage rib rivets.