I dusted off my solo riveting skills today! I riveted the left side armrest in (mostly, except the for and aft connections to the bulkheads) and finished riveting all of the portions of the left side skin that we'd skipped while the fuselage was upside down.
It's a little bit difficult to figure out which rivets need to be left out for now and which can go in. Most of the skin to longeron rivets (the top row) have to wait until the top skins go on, but there are some that I think need to be put in now. I'll have to dig through the plans and try to figure it out.