Take extreme caution with your welding gun. Over time the gas hose will pull away from the welder end of the gun/hose assembly. You can not buy the fittings to repair said problem. The problem will cost you 150$ for a brand new hose/gun assembly. I will try and take some pictures and post them to show what I am talking about.

 

Camera died so no pics, but it would be a good idea to attach a small steel cable to the gun and welding cart to remove the tension from the gas line when working with the gun.

 

i have mine held up with some zip ties to the hande on the top of the machine, to ensure the hose doesnt get bent/fall off, or anything.