SIP - enough with the mods!!!!
personlay i would have kept that £550 in my pocket and bought something from a main manufactorer techarc have terible customer service would not touch them again with a barge pole as you can tell one unhappy customer see my post in buying a welder
Before you launch into a rant about Techarc on every post containing the word Portamig I'd like to point out that the warrenty arrangements for portamig machines are with Weldaquip and so far from my observations on this forum his aftersales and fault rectifications have been second to none.
I think also the portamig has a longer warrenty on the transformer but I could be wrong and that might be my poor memory
Sorry to hear about your issues with a transformer on an MTA machine - in all my research on this forum and the rest of the web I could only find a couple of very minor faults reported - hence a purchase of a portamig