Tonight I back riveted the right top side skin, just the bottom row. Access was harder than with the other skin, but I had success climbing onto my work bench and crawling inside to rivet. This was a “first”; I climbed inside my plane for the first time! My back rivet plate is about the same thickness as the rubber floor mats from Harbor Freight, so I was able to fully support the skin while crawling inside.
The finished result was great; nice tight skin, no oil-canning and good shop heads all the way down the line.