Just trying to find out more info on this welder i bought. It is a SAE 400 diesel pipeliner with a 4 cyl. perkins motor, New radiator, new starter, and all new hoses. I purchased this welder for 1,500. Now i have been seeing some guys talk about a red face, can somebody please explain what that is? this welder has a red label on it where the switches are, is this maybe a red face? Are they a better welding  machine or what?  Any info is greatly appriciated!