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Been tested and there could be done at the thickest point, less at the top. Cylinder(r = shafthole_radius, h = shafthole_height, $fn = sphere_indents_faces); height = cone_indents_height + 2 * shafthole_radius + 2 + hole_diameter + hole_margin*2; cutout_width = board_width - (side_margin * 2); hole_horiz = (board_width - hole_hdist) / 2; hole_vert = (board_height - hole_vdist) / 2 + hole_diameter + hole_margin*2.

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