[StingRay]

For tin you don't need a big welder. Even a 90 is bigger than you need for just tin work. No flux core. Use 023 wire and 75/25 gas. I use Esab easy grind wire as it's softer and will hammer out to stretch the seam easier with less chance of cracking. It also grinds easier and that puts less heat and less additional shrink into the panel as well.