Quote Originally Posted by billyj View Post
biggest problem you will have is you need different gas mixes for different metals and processes

is argon/co2 mix to mig steel, straight argon to mig aluminium or tig steel and from memory its an argon/helium mix for tig aluminium
I might be wrong, but I don't think they use helium on TIG gas mix they sell. I think it's pure argon 'cos it's cheaper for them.
I think argon/helium mixture would cost a fair bit more, or probably better to get a helium bottle and mix your own gas mixture using regulators.