I'm looking at getting a small mig for light welding excaust pipe and the like . I am looking at an swp turbo mig 150. And a sip t166. Allso a telwin inverter mig . It will only be used twice or three times a year I can't justify spending big money on one as I have a good inverter welder to do heavy welding. Has anyone any ideas on these welders . Cheers guys