Dan: This looks like a tank that was built for Contemporaries back in the day by ATL Fuel Cells. They stopped making them sometime after Contemporary went out of business. As a MacHead, Powerpoint works for me. Please email me what you have at
bigrich1@mac.com. Mickmate, this might be the optimal size for our beasts. Also, ATL make a variety of accessories that you may want to use, like roll-over valves, pickups, etc. What do you think? Rich