I have an option on one of these - https://www.craigmoreonline.co.uk/sip-05162-weldmate-p177-ac-dc-tig-arc-inverter https://www.cromwell.co.uk/shop/wel...f-ac-dc-tig-arc-inverter-welde-/p/SIP8800516C Im pretty dubious of SIP welders really. I had a SIP mig which i gave away (free) to a friend, and really didnt feel like i was doing him a favor at all (i did warn him and he was still [foolishly] game!) My gut says no, but its cheap for an ac unit (£300) - but good value and cheap are really not the same thing. I can have a go on the unit, but my only gas is argoshield light, so, maybe ok to see if it arcs and that, but not much else. Anyone got any comments?