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Engraving depth. [mm] // Top radius of the indenting cones, measured from the top rotate_extrude(convexity=10, $fn = sphere_indents_faces); height = 128.5; // A little less then 3U // Thickness of module (HP row_2 = row_1 + vertical_space/7; row_4 = row_3 + vertical_space/7.

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