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1.2; right_rib_x = width_mm - h_margin; left_rib_x = thickness * 1.2; right_rib_x = width_mm - thickness; // draw panel, subtract holes union() { cube([board_width, board_height, thickness]); cylinder(thickness+standoff_height, r=standoff_radius, $fn=360); cylinder(h=thickness+standoff_height, r=standoff_radius, $fn=360); cube([cutout_width, cutout_height, thickness+3]); cylinder(h=thickness+standoff_height+3, r=hole_radius, $fn=360); vertex 0 -6.27065 7.71007 vertex -6.33566 0 7.50886 vertex 4.6363 4.35153 7.51116 facet normal -4.720703e-001 8.093055e-001 3.495342e-001 vertex.