DAE realize that puddle control is everything for vertical up MIG?
Honestly, I've been struggling with vertical up welds on 3/8 inch mild steel for what felt like forever. Tbh, my beads kept coming out uneven, with either too much penetration or ugly sagging. Ngl, I was about to resign myself to only doing flat work. Then, I remembered an old-timer saying to treat the puddle like it's wet paint, smoothing it out as you go. I slowed my travel speed and focused on keeping a tight, consistent arc length. After a couple of test pieces, the weld profile cleaned up perfectly, with no undercut. It's a minor milestone, but finally nailing that technique has boosted my confidence on site projects.