Mine is a Lincoln 210 square wave. I bought it off Kijiji on my way to Johns for my crash course. I figured if I needed one i may as e]well learn on y own rather that learn on Johns then discover that whatever I bough behaved differently. My MIG is a Miller 251 that I've had for about 15 years.So mig or tig...which is easier and which gives a better end result...remember this advice is going to a person with no training in either and really doesn’t mig weld very well. Also your welds look very good to me..Which tig welder do you have?..thanks..