Greetings all.Man I sure like the forum here.Heres the SA Question.I have a 1957 black face it has 4 range positions.The other is a 1965 redface it has 5 range positions.Since I havent opened ethier welder for brushes/bearingsI could use either one What are the advantages of the evtra ranges???Im thinking the 5 ranges woulg give better volt/current ranges.RickASE master auto tech.lincoln sa-200lincoln 225 (gas/onan power)Miller dialarc 250Century 105 wire feed.Airco 185 busy bee A/C