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// left_rib_x = hole_dist_side + thickness; output_column = width_mm - thickness*2; // draw a horizontal cylinder around the top rotate_extrude(convexity=10, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, r2 = knob_radius_top, h = hole_depth, center = false); z_position = sphere_indents_radius + (enable_stem ? Stem_height : 0) + knob_height - cone_indents_cutdepth; for (z = [0:cylinder_number_of_indentations] cylinder(r1=radius_of_cylinder_indentations_bottom, r2=radius_of_cylinder_indentations_top.

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