I posted this in the gear head section too. Heres the bullet fuel tank. A real pain and $$ to build. But it worked out well. 3 1/2 gallons and is 8 inces in diameter. Will use 8 inch tank brackets to mount. I molded the 4 tabs on the sides to hold the tank from sliding.
Cool part is, there are no seams in the tank. Only on the surface where the molds break apart. Any size fittings can be placed in the tank, and the dump on the bottom can go -16 or bigger, if there is such a size. The one in the pic is -12.
http://www.***boat.com/image_center/...050142-med.JPG
Sorry, didnt have time to mop the floor.