between the invertec 275 or miller 280, for pipe welding ,using 6010 rod,for root pass and 7010 rod,i decided to go wih miller cst 280, but might have a good deal on a lincoln precision tig 275. I would love to fool with welding alum.,and the tig 275 with ac /dc is the way to go, but right now my main concern is pipe welding ,so the question is can the precision tig 275 stick weld as well as the invertec 275 or miller cst 280, using 6010 rod and 7010 rod.I understand it has more amps and better duty cycle. anyone?THANKS