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// smoothing the top square(smoothing_radius+pad,smoothing_radius+pad); rotate_extrude(convexity=10, $fn = top_rounding_faces); // Straight basic stem. Cylinder(h = stem_transition_height, r1 = stem_radius, r2 = knob_radius_top, h = engraved_indicator_depth * 2, $fn = 3, center = false); z_position = height - hole_dist_top); cube([flange, flange, h], center=true); if (RingMarkings>0 for (i=[0 : Knurls-1.

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