Weld a rod on center of the circle get some string and tie it to both rod and plasma or torch move slow for best results
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You have some extreme talent!
Very nice work, im currently in a slow process of building a 42x48x16 shop. I hope to get the concrete work done this summer,Next summer I'll will frame it all up.
My current work of operating heavy equipment 6 days a week has put it in slow mode and building outta...