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Yeah, good points. That's something I struggle with a bit, I run pretty much one size of everything with a couple of filler wire sizes as it's just easier and make do at the extremes. For a 'hobby'...

I'm told if you can use a glue gun or poo up a window you can weld, dunno if that helps (or if it's true haha).

Ahhh, what was it like before? Gotta ask that, having been accused of similar in the past haha.

Pulse tig setup, get a unit that does AC/DC is my advice - you may not want to do alloy/aluminium but it has a use for some oddball things like some cast iron brazing and the like. Very useful...