Here is my new tank. Its Polished 4" round Stainless Steel, 12" long and holds 5/8 of a gallon. But it could be aluminum or steel. Fits nice under the frame. Couple of dryer vent worm clamps (hose clamps) to hold it on. Brass fittings from Home depot. Builder is ummmm its up to him if he wants to come out. Using a PVC cap for now until the new one is built. Works great. Sorry its a bit dirty cause I ride it, yummy mud.