MIG welder settings. I think we used the center column, somewhere between 12- and 16-gauge. Published on April 17, 2017 in Building the Mirror Blaze in Pictures IX: Learning to WeldFull resolution (3264 × 2448) ← Previous Next → MIG welder settings. I think we used the center column, somewhere between 12- and 16-gauge. MIG welder settings. I think we used the center column, somewhere between 12- and 16-gauge.