Yesterday I had a closer look at the plans and instructions for the vertical stabilizer, and today I started by finishing the edges of the rear spar doubler. The punch marks were so rough that I didn't want to scratch the spar channel with them.
I bought a drum sanding kit, and it worked great for the lighting holes, but even the smallest drum was too large for the gap in the upper part of the doubler. Some emery cloth wrapped around a pencil mounted in an electric screwdriver worked great!
Finally I clecoed the doubler to the spar. Any drilling will have to wait until tomorrow, though. It's bed time now.
