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This one, Number of faces around the top edge. ≥30 means "round, using current quality setting". Cone_indents_faces = 30; // Height of the base shape. See knob_base(). Rotate([0, 0, 90 + sphere_indents_offset_angle + ((360 / sphere_indents_count) * z)] sphere(r = sphere_indents_radius, $fn = smooth .

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