This wire is Shiznite. The Sime reviewers don't like it for sheet metal, so it struck me that I don't know if you use .030 on sheet metal or if you just checked .030. But in my experience with automotive sheet metal, use the smallest wire you can use and 75/25 with the adjuster set on a high setting (25-35 pounds). I'm running this INEFIL at 0.023 with this setup and it's amazing. I use .030 on thick mild steel and it's amazing.