I have never welded with my Miller 211 off a generator. Found a deal on one. Was wondering what to look for while test running it before I buy. It has 7,000 running and 12,000 surge watts so it should push the welder just fine. But I know nothing about generators, so if anyone can help me with assurance before I buy it would be greatly appreciated. It's a 6 year old General. He's asking $430. Thanks!