Got my new machine today! I was, in fact, a 200st. Didn't try it on 120v yet, but it ran the chit out of every brand of 7018 I have. Compared to my Thermal arc 181i, it welds awesome. I put the leads for the 200 away and just transferred my leads from the 181i since the dinse connectors are the same. I will post a project with it in a few weeks.