After taking a week off for AirVenture, I got back on the tanks today. Got all of the stiffeners, the fuel flange, and fuel drain prosealed and riveted. Got it all done with one tube of sealant. Put a few once's in a sandwich bag in the freezer and then had that available for clean up.
7/31: mixed up 20g and got the fuel bungs and nut plates installed on the inboard rib and installed the inboard half-rib.