Hello Ryan, Welcome to the site. I hope your wheel build goes well, there is quite a bit of info on here about building wheeling machines and Kerry is something of an expert and will give you advice if you need any.
A wheeling machine can only do a a small part of the work on any given panel.
Tig welding has a lot of advantages over mig for joining sections of panels- don't get rid of the mig though you will always find uses for it. (plug welding etc). I prefer gas welding over tig -especially for aluminium. For steel I guess the tig is just a matter of personal choice. (I use both)
David
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