Riveted the rudder stiffeners. This was done by back riveting. The rivets came out nice and flush on the outside. I left the blue vinyl on the rudder skins to see how I liked working with it. It is nice to have a little protection on the skins, but you can't do much work other than drilling with the vinyl on. I just cut out the rivet lines and left the rest of the protective vinyl on for now. It will come off in a few days when I rivet this to the skeleton subassembly.