I run two pressure regulators and a mixer manifold, and mix my own argon and CO2. It's a LOT cheaper than buying pre-mixed gas, and I can alter the gas mix for different metals. Aluminum and stainless gets straight Argon- - - -mild steel gets CO2 with just a little Argon mixed in. I haven't run any flux core wire in a long time, but it can come in handy for rough welding on structural stuff- - - -gates, fence posts, work benches, etc.

I just can't find the right amperage setting for 2 X 4's- - - - -just about burned the house down adding a bedroom!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!