Also guys, just remember a weld may look really nice (like some guy walking the cup at 40 amps) but the weld is garbage and the penetration is piss poor. I see this time and time again, it aint on the surface that what counts. stack all the dimes you want but if that weld isnt done at the proper amperage for the material thickness it will fail.
ex: if i am welding 1/4" structural SS i will do a root pass at 180 amps and cap it at 140.
I don't TIG, but this is true for any and all welding. I've seen pretty welds fail.