The balloon on the pressurized tank stayed inflated overnight!!!
I feel confident the tank doesn't have leaks at this point so I bolted and screwed it onto the spar! I had a problem getting one of the bolts started on the right tank. Today I was extra careful to finger tighten each bolt to make sure it was fully engaged with the first thread of the nut plate before I put the wrench to it. I successfully got all the bolts torqued (42 in#) and marked.
I finished off the day prepping and dimpling the bottom wing skins.
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