Since last entry, have righted the HS assembly and begun riveting the right side skin to the forward spar. Learned from hard experience with the left side that it was pretty easy to scuff the spar with the bucking bar in the close quarters so I have laid down strips of duct tape along the spar flange to prevent it on this side. I'm also getting better at shooting rivets. Glad I get to learn on these relatively less expensive parts!