I have been getting alot of thaw calls lately. I just bought a slightly used Ridgid KT-200 unit. Anybody have experience with these? Am I better off just getting a large welder? Or do these units work well for smaller jobs? I have'nt really used it yet and was just wondering if anyone has any tips or advice concerning the unit and if it's worth messing with. Not alot of info on these guys. Thanks.