I started riveting the aft fuselage upper skin, but I've only finished about 80% of it.

I had to make a bunch of small shims to go between the F-808 and F-809 bulkheads and the skin. There were small gaps between the sides of these bulkheads and the skin - this caused the skin to be pulled inwards in those areas, making an unsightly depression. The F-809 was the worst - I needed some shims up to 0.063" thick in places.

I've still got a couple of minor tasks to do on the fuselage. I'll finish the forward baggage compartment door after I buy the lock mechanism. The forward fuselage upper skin will be riveted after I finish the wiring and avionics, as I have much better access to the forward fuselage area with the skin off.