I have not asked around about the purchase of a tank - I know some suppliers will refuse to fill larger tanks unless its THEIR tank. I have about a month to get that all sorted out.

As far as consumption goes, I have no clue other than simple math of say 15cf/hr and a tank with 330cf, that is 22hrs of welding. Allowing for say 10% residual in the tank and losses, that is roughly 20 hours.

What will be interesting is to see how the math compares to reality (but not till next January when hopefully the EXT shows up).

Cheers,

Mike