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If (RingWidth>0 cylinder(r1=KnobMajorRadius + RingWidth, r2=KnobMinorRadius, h=RingThickness, $fn=50, center=true); if (RingMarkings>0 for (i=[0 : Knurls-1] rotate([0, 0, 90 + sphere_indents_offset_angle + ((360 / cone_indents_count) * z)] sphere(r = sphere_indents_radius, $fn = sphere_indents_faces); height = 128.5; // A little less then 3U // Thickness of module (HP) width = 24; // [1:1:84] left_panel_width = 40; // widest element is rotary, at 30mm right_panel_width = width_mm - 10.

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