Hi
A couple of years ago I needed a welder quickly and at that time funds didn't run to the welder I would have liked so I bought a cheap cheerful gasless MIG. I hated it, but it did what I wanted and didn't take long to learn. It had a TIG function but no torch so I bought a TIG torch with a gas control on and away I went. Mild steel tidier than gasless MIG and stainless as expected and TIG brazing a dream oince I bought the correct rods.
What I wasn't impressed with was the rate it went through the Argon. So I bought a new regulator with a floating ball not just two gauges, that was when I saw the little ball never settled. The tap on the torch didn't shut the gas off. By this time I had bought the 200 A welder I wanted that also hdid MIG, TIG and MMA so I grabbed the torch off that. That leaked as well.
I've now bought a gas solenoid, torch switch a little PSU and a box to mount everything in and made an outboard gas control. Bliss now when I let the trigger go the little ball settles until it is pressed again.
Brian