Finished deburring starboard rear fuselage. Applied Cortec and riveted stiffeners. Nothing terribly difficult, just tedious. Most of the time is spent getting the ends of the stiffeners shaped so they fit the corners and of course, deburring. After riveting was done, I returned the starboard bottom longeron to the bottom skin and removed the port side bottom longeron and started the same process with the port side skin. I got the top and bottom longerons drilled and called it a pretty productive day.