Drilled out one bad rivet from yesterday, and put in another. Cleco'd skin in and put in first rivet. Also, made my back rivet board from a 12 inch x 4 inch steel plate from Lowe's. 9 bucks. Polished it up on one side, cut out a matching hole in a 4x2 foot sheet of birch, and inbedded the plate in there, backed up by a matching sheet of birch. Wood glued the whole thing together and now I'm ready for back riveting. UPDATE: After back riveting the Rudder, I added the lines to help me locate the plate when it is hidden under the skin. Works great.
