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Have you seen the price of precision metrology equipment lately? Neither have I, I've been too busy rubbing these sticks together in an attempt to find flatness. We've got merch! https://notanengineer.shop Patreon: https://www.patreon.com/NotAnEngineer Here's Alex's channel: https://www.youtube.com/@anengineersfindings And some better reference material on the three plate method, if you're interested: Accidental Science: Flat From Scratch, revised - The 3 plates method Robrenz: ROBRENZ ATD #1 INTRO, 3 PLATE METHOD Oxtoolco: Making flat lapping plates 1