So with 6 gallons in the kettle, water level is 9-3/8" from the bottom, which gives me 5-7/8" to the bottom of the bead. If we can keep the boil off rate to 1 gph or lower then we should be ok? I figure using the 1.5" TC set as snug to the bead as we can get will still net us about 3.5-4" of...