Original poster: "Brad Huff by way of Terry Fritz <twftesla-at-qwest-dot-net>" <huffb-at-avalon-dot-net> I just purchased a Forney arc welder with multiple taps for my pole pig ballast. Yesterday I stumbled across a Century 230A machine with the adjustable slide for current settings. Is there any value in one model over the other in the real world? Thanks.-Brad.