Over the course of about a day and a half I built my vertical stabilizer. No mishaps during the build, it went pretty easily

It was easy enough to countersink the few rivets that needed it so that the assembly could sit flush against the fuselage.

Riveting the skins went easy enough. You have to reach inside the stabilizer to hold the bucking bar up against each rivet, and then you add the spar at the very end.