Here's the pictures of the original aluminized steel tank.

I had thought of the copper idea, but didn't know if it would work. May try it tomorrow.

Thanks to all the replies. . I've welded mig/stick stainless and some tig, but not much this small of a guage material. I'm using 3/32 filler. Yes I am meaning warping. I figured I'd probably have to skip around and back step. A lot of it will be tee butt welds and a long lap weld. Dimensions are 65...

I am building a sprayer tank out of 14ga 316L stainless and need help with the settings, I think I'm close but it is pulling all over the place. Are there any methods to keep it straight. I have been practicing on some drop pieces and this is what I have so far.