ive just bought a snap on mig welder, pretty old I think, from a mate that's moving to spain. its got a big bottle, regulater gauge, euro torch etc and was working brilliantly last time I was round. But as we were making him a new work bench the gas stopped flowing for some reason, and its just sat in his garage since. so with him moving I mate him a cheeky offer and he said yes lol so ill hopefully be getting it tonight. my question is, are they any good? (I think he said its actually a Lincoln but with a "snap on badge" on it) and what could the gas problem be? easy fix? ive not done much we