yeah, two good points.

I forgot to mention: I also wear my respirator, so any chance of the zinc fumes are pretty negligable, when coupled together with the fan. And the breeze blowing away the gas shield is a pretty big factor too, probably part of why the welds aren't as clean as they could be.

I'll order in a half sheet of ungalvanized 20 ga tomorrow. Just seems like I never think of it till I need to make a guard, then it's too late...

meanwhile, about these shrink issues?