Welding when you’re not 40 anymore…

My reasoning was that by dragging, I can build up the weld slowly and add more wend on the previous one. For sheet metal, this works to close up gaps. The instructor said that when doing MIG, you PUSH the weld. I tried that at home and was surprised to see my weld beads improve.
Sounds like the instructor worked at a high production bar joist structural shop.
You can go either way. He`ll tell you supposed to go up hill on a vertical joint too. Yeah you get more penetration but a lot of instances I`ll go downhill.