Thanks for the information, John. As far as terminology is concerned, I'm far from being a stickler about it. Insisting that aspiring metal artists say GMAW, GTAW, and SMAW rather than MIG, TIG, and stick is a non-starter, in any case. If the popular terminology has the potential to confuse understanding of the process, as in the ground vs. work lead issue, I try to mention it, but that's all. Insisting on using technical terminology (i.e. DCRP rather than just electrode positive) in setting where it's unfamiliar and unnecessary, can be a good way to cause confusion and reduce clear communication.