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Height + rotate_vector_sin * height], // top horizontal rib // bottom horizontal rib // h_wall(h=4, l=right_rib_x); // one more vertical to mount a circuit board to, dead center pcb_holder(h=10, l=top_row-rail_clearance*2, th=1.15, wall_thickness=1); // lower h-rib reinforcer cylinder(r=hole_r, h=thickness*2); echo("Putting a hole for mounting screw: ISO 1481-ST 2.2x4.5 C.

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