I did as you say with going so slow, each weld was cool to the touch. It took me 3 days to try this last patch and I’m going through 80 cf bottles of gas like crazy. There is a point where the patch starts to bow up and is no longer flat. Maybe it’s the plannishing that I need to work on. I appreciate all the advice. It sounds like you guys do think it’s possible to weld such a flat panel successfully. I’m debating if I want to try one more time or if I should just by a new panel. I hear what you are saying with cranking up the heat. Especially if there is no gap it’s really challenging to get the weld to go all the way through.