I am wondering about the power tig 255 ext I know it is a great tig welder but I want a welder that will burn a 6010 and 7018 as well and I'm hoping that this welder will do it all also what are the differences in features between the 210 and the 255 is the 210 better Ie better ac features? I used to own a powerTig 250 but I sold it and wish i hadn't now. Thanx for all info.