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Rails v_wall(h=4, l=height-rail_clearance*2-thickness, th=thickness*1.25); v_wall(h=4, l=height-rail_clearance*2, th=right_rib_thickness); //outline of whole PCB cube([137.5, 97, 1], center=true); working_increment = working_height / 6; // generally-useful spacing amount for vertical columns of stuff col_left = thickness * 1.2; right_rib_x = width_mm - thickness*2; union() { difference(){ color([.1,.1,.1]) panel(width); // lower h-rib reinforcer.

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