Yesterday Don and I contiued riveting the bottom left inboard wing skin. I was having a hard time keeping the bucking bar straight so I used the back rivet set as a bucking bar. I had seen this on another builders web site. I used a wood block as a handle instead of steel. This rig became very handy, especially when working around the nut plates on the spar. Also less likely to do damage if dropped. We still had a few minor smiles where I had slipped with the normal bucking bar. This skin is taking so long because I have to inspect every rivet with a flashlight and mirror.