1.5 hrs, 65 rivets
Got some help riveting, Mark Goldberg came over. We knocked nearly all of the center bottom skin rivets, and the last rivets on the lower edge of the aft 970 skin. These are tough to set. The flush set can't get at some of them, and curls the bottom skin over on others.
We also worked half way down the 905 bulkhead on both sides. One more session like that, and then it's time to work on the forward section again.