I have a Miller Econo Twin HF. Serial #jg132016. I have the schematic that came with the welder. It is just a general layout with out any real information on iy. I need a schematic that tells all the parts and names and voltages and so on. I want to hook up a foot control to it and need to know how large an SCR I need and where to wire it in. I'm new here and could really use this info. Mac