I installed the vertical tail today. First I had to install 3 anchor nuts on the forward attach holes, this was easy, but the nuts and bolts on the aft side, especially the bottom ones where hard. It's nearly impossible to get a nut on the bolt using just the inspection hole in the fuselage sidewall, luckily I have not installed the bottom skin so I had (some) access through the bottom as well. Still not an easy job, a lot of swearing happened along the way.