Well, an electricrouter which is steered by computer controlled servo motors and can cut the perfect-sized hole time after time.
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Tomi of Finland (no, not that one) cuts these amazing pixelated pictures from plywood using nothing but an electricrouter.
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Pixel-Perfect Plywood Portraits Tomi of Finland (no, not that one) cuts these amazing pixelated pictures from plywood using nothing but an electricrouter.