Duane will kill me, but I had to post one very simple message. He is maybe the most knowledgeable individual especially on the older MM200's you will ever find and I am sure any others. I had one with what appeared to be a major problem with the wire feed motor jerking. After a week of back and forth and his expertise, mine was fixed and works like a new machine. I was looking at a possible new motor ($700) new board ( $100 or more) and no telling what. After his valuable help and I "think" about a $10 resistor as I recall, I have no problems and a machine that welds like a new one off the shelf. So, my public thanks to him and his willingness to help out a total stranger-- I AM STILL INDEBTED. T Rice-- Oklahoma