I use Miller welders. There's nothing wrong with Lincoln. Kind of like some people driving a Ford and some a Chev. On welding heavy stuff with wire, I can get better penetration with flux wire. I have a wire feed attachment on a 440 and I use nothing but flux wire in it. But like anything else. If in doubt, I get two pieces of scrap similar I'm going to weld and play with it until I get the heat and wire speed right. My personal theory is, the thinner the metal, the more you need mig instead of stick or flux wire.
