Thank you gentlemen for your replys. I really can't hardly imagine welding on aluminum that is thicker than 1/4". As soon as I say that though, I will need to. It certainly won't be an everyday thing. Does welding titanium pose special problems? I hope to ultimately get a license to manufacture...

Back in the day...25 years ago I used heli-arc for chromoly. I would like to weld stainless, carbon steel, aluminum, and eventually titanium. I was a good gas welder on exhaust systems.

I have recently rediscovered Tig Welding. I am doing hobby gunsmithing and am interested in a machine. I have done some research and am thinking that a "suitcase " type of machine that operates on 110 or 220 is probably suitable for what I need. I might weld on something as big as 3/16&quo...