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Great build! I'm going to be building one for the small Chinese K40 laser cutter/engraver I just bought. I got this metal cart from Harbor Freight (http://www.harborfreight.com/24-inch-x-36-inch-steel-service-cart-5770.html), assembled with the top "shelf" upside down, and now I'm going to try to incorporate a fume extractor build into the bottom area of it.
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