[alfy65]

I have used a Lincoln Sq. wave 175 amp for a couple of years , both pedal and thumb control.I have used it for welding steel band saw blades .020 thick up to 1/4" aluminum.
1/8 " aluminum takes about 120 - 160 amps give or take, so ya want to get enough reserve amp with your machine. I bought mine on e-bay in 2005 and has served me well for tig and stick.
Good luck..