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Cylinder cylinder(r1=knob_radius_bottom,r2=knob_radius_top,h=knob_height, $fn=knob_smoothness); smoothing(); } external_direction_indicator(); } shaft_hole(); } set_screw_hole(); } arrow_indicator(); indentations(); } } // draw panel, subtract holes // v_wall(h=4, l=height-rail_clearance*2-thickness); // top edge smoothing.

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