Hi, I bought a Ferm 150T Mig welder a couple of years back which I’ve only just got round to using and am having trouble with. Unfortunately I misplaced the manual so I’m a bit unsure on setup and settings. It has the rotary wire speed setting, a min/max switch, and a 1 / 2 switch. One of the switches seems to adjust the wire speed to a slower or faster ratio which can then be fine tuned with the rotary speed setting. Does the other one give 2 different powers to weld on ??? I’m a complete novice only interested in welding car body’s (seam welding, etc, on my rally car) so any advice on what settings to start with would be great. Cheers.