I know I asked this before, but that was a long time ago before the forum was re-arranged...<br /><br />Can I build my own fuel cell and have it certified? Where would a person certify it?<br /><br />I have access to a MIG welder and machine shop etc... What kind of aluminum would I need to use, or should I just buy a plastic cell?<br /><br />The original tank was 70-something gallons and it was steel. <br /><br />I don't know if I can find a poly tank that will fit in the area it needs to go. Are there any web sites that have good specifications?<br /><br />Also, I was thinking of making the tank even bigger, (like 100 gallon) but don't know if that would be wise or (even legal) Does anyone know?<br /><br />H.