I have a 37 gallon gas tank that has small leak if filled over 25 gallons. It looks just like the one this guy is selling: http://coloradok5.com/forums/showthread.php?t=154672 I was wondering what can be done to fix the problem? The leak is located behind a tab that is welded into the side of the tank that keeps the tank from moving while installed. There is not any rust inside the tank as far as I can tell. IIs welding the tank my only option, or can I use the POR-15 Fuel System Restoration? If so, how much do I use?