After getting some advice on how to handle the fuel cap leaks, I proceeded testing again.
I had received two different approaches that are complimentary. They are to use generous amounts of fuel lube on the fuel cap o-rings and to just encase the fuel cap in a latex glove for testing. Apparently this is a common problem with the fuel caps. Not really an issue unless you are out in the rain.
I did find a secondary leak in one tank. I think I can add a little more sealant and fix that problem. I believe I can get to the inside and outside of the joint without much difficulty. The other tank has a small leak that I've yet to discover the location.
Hopefully my fuselage kit will arrive on time at 9:30am tomorrow and that will take my mind off the tanks for a few days while I inventory the new parts.