oldhemi wrote:
Anyone know if this thing can do THIN stuff, like 20 or even 22 gauge sheet metal? What needs to be added to this unit for gas?
Absolutely. For thin metals you'll want to change up your gas Standard stuff like DOM tubing and axle plates, gussets,
etc. use 75-25. (75% Ag - 25% CO2) For sheet metal use 96 - 4 (96% Ag - 4% CO2)
The lower CO2 content decreases penetration allowing you to weld much thinner stuff.

Never use 75 -25 on anything but steel. No aluminum and no stainless.