0.030 solid wire using C25 gas. I've thought about going smaller because I'm creating bigger welds than I'd like. I've always had trouble laying down flatter beads or burning the welds in on thinner material. Best results have been from just stacking up spot welds. If that's what I have to do, fine. I just would like to develop other methods, too.
Here are some pictures.
I also found a hair line leak. I've been using brake cleaner to find any leaks. I just bought some denatured alcohol to fill each tube up with as a method to check for leaks. I wish I had compressed air but oh well. I figure if a thin liquid like denatured alcohol won't leak, neither will exhaust.
Thanks