I am looking for some help. For x-mas the ol lady and brother bought me a welder. They got me a miller xmt 304. It came with all the stuff for mig but nothing for tig. I am trying to figure out what I need for a tig torch for it since the 304s do not have the built in gas valve. I understand that the one thats needed has to have the gas knob on the torch and a gas line that t's out where in goes into welder to control the gas. Can someone point me in the right direction?