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Some of you may know that I recently got a cheap Laser engraver. Well it's taken a while to get it set up and running as I want it but it's done. I tried some old slate the other day and I was pleased with the results. So. I'm on the scrounge. Do you have any old slate that I can have please. Anything bigger than about 3" or 75mm square will be great. Happy to collect or you could bring to a meeting if easier. Thanks in advance. 👍