Quick question. I am switching out my fuel lines and regulator with an acetylene/propane T line and regulator. My other line hooked up to a flanged 3/8" shut off valve and the regulator is a 0-30 with no gauge just a dial for the flow. I want to use the "T" line rated for propane and acetylene and the regulator with it because it has a guage and will hook up to bigger tanks but...the fitting is slightly different and will not screw on to the shut off valve i have already running to the forge. Wh