Here are two areas where I'm thinking of different options I might have to weld, especially in the corner seam, on these small 20g parts. I have a MigWeld 140 with C25 gas and have had good success welding butt joints on the rest of the firewall (same 20g) - but I'm basically stitch welding and overlapping them. That way I can move around and not generate too much heat. My current settings are 28 for arc volts and 30 for wire speed.
Just curious if anyone has experience with this gauge and can offer some suggestions. TIA