Ever do it on a vertical surface?
Everything at this point is spot welds anyway, so it SHOULD be pretty easy to control the gravity effects, but Im just curious.
Yes, but not very large holes......probably nothing more than a quarter to half inch for me. Maybe fill a little then let it cool and then finish if it's bigger.
I did the spot welds when I changed out my corners using the copper trick, just c-clamped the copper so i didn't have to hold it or anything. If I couldn't c-clamp it I would use the big magnets that overlapped the copper on each side to hold it on
