Santa brought me 4 - brand new 2 gal RotoPax fuel tanks. Little did santa know I was going to find a factory sub fuel tank and filler neck. My plan was to build a swing down rack where the spare goes to hold the 4 RotoPax tanks given me 8 extra gallons for emergency use. They are a perfect fit under the 80 for someone doing the same. PM me if one or all of them would work for your project. I also have the clips to hold 2 together.