if you weld the seam all at once, don't you get any warping on that?

do you mean, instead of "twisted" that you cut out sort of a cross shape and bend them all down to make 90*angles? Ahh. Never mind! I'm not the one who needs to know

just occurred to me: trap door baffles like in oil pans for roundy round cars might be useful for off road use. I'm going to think on that one.