Worked on a number of details getting ready for closing the aft fuselage. Countersunk and final trimmed the aft longerons and doubler plates. Enlarged the attach holes for the aft bulkheads to permit installation of 1/8 inch rivets (I decided that all the aft bulkheads have concentrated loads that warrant larger rivets. primed and dimpled the upper longeron. Lots of misc cleaning final trimming and deburring
