Completed the close out of the left tank with attachment of the rear baffle and Z bracket attachment. With riveting this takes about 4 hours per tank. I was able to finish the countersinking on the right tank and insert the rivets they call out to leave open until sealant is dried. Once all is done, I went back and put sealant on all of the shop heads and on the pull rivet heads on the Z brackets. Both tanks are sitting now and I will wait a week to test for leaks.