Thanks for your thoughts guys, haven't had a chance to play with it again( been a busy crappy week).
I did however pop into Total Tools where i bought it, they printed off a lot of info, from Uni-mig themselves on the trouble shooting side of things. Hoping to have a play with it 2moz , just super keen to finish the car off. So close to rust free, is not funny, I've doubled checked the wire feed roller, definitely on the .6 side. got a .6 tip in hand piece. The bloke at Total Tools said about power supply, but why would i get great penetration using .9
?? I've got no power in the shed as yet, feed from a ext cord from house. Got the line under ground but just waiting for sparky to connect both ends. Maybe the prob, but again why so such a good weld on .9. No idea, should've kept with my old Sip welder, i had that for 10 years with no probs. See how i go tomorrow, if not the Boiler maker from work is coming over to have a play. Thanks again,will keep you posted
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. I was having trouble with the wire feed with the .6 wire. So i put the .9 wire in and worked fine with a great weld ( great penetration and very consistent). Anyway bought a 5kg spool of .6 wire and it feed fine (but no penetration) Gas is from supagas - supa Argon52 . Was running cig gas argoshield light on my last welder but supagas has cheaper bottle hire per year and told supagas it was for a mig when hiring bottle. Any thoughts 
