After no doing much work the last month, but spending a lot of time just staring at the fuselage in the garage, I noticed the right front skin was not sitting as tightly as I'd like against the C channel. I must have not been holding the rivet gun perpendicular to the skin. Decided to drill them out and redo them. I was actually really proud of how good a job I did drilling them out - I'm a real builder now. Dozens of nice little rivet head donuts on my 3/32" punch. Got it re-rivetted and it is much better now. Glad I re-did it.