I have 2 boats with fiberglass tanks a 19 Schiada and a 21 Spectra, The Schiada tanks are delaming on the inside, so I'm going to have to change them and I might as well change the one's in the Spectra before I put the engine back in. Any suggestions ??? I'm thinking maybe 2 20 gallon tanks ??? Want as much fuel as I can get comfortably, is there a plastic alternative out there that works for these applications ???? Any help would be appreciated !!!