http://www.screwfix.com/p/fan-cooled-mig-welder-150a/30030 its £140 i am going to save up for a porta mig but that wont be till next year, could i weld rear crossmember on an escort van with this ? i know 60 amps minimum is too high, but i could use the thin metal technique. dont supise i coudl weld echaust with this could i ?