I managed to get all the stiffeners and trim servo access panel/stiffener riveted onto the left skin. The aft most rivets were a pain. You can get to them with the rivet gun, but you really need 3 hands. One extra to peel the skin back. I clamped the skin to the table, put both hands on the rivet gun and used my head to push the opposite side skin back. I ended up having to drill out and replace one rivet because the stiffener wasn’t sitting flat against the skin and the rivet swelled into the gap. No biggie. All in all, I’m pleased. The right side should be easier.