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Buffering between (some) stages. Needs a _big_ knob, these are for steps only row_1 = bottom_row + v_margin + 12; top_row = height - hole_dist_top); cube([flange, flange, h], center=true); if (RingMarkings>0 for (i=[0 : Knurls-1] rotate([0, 0, 90 + sphere_indents_offset_angle + ((360 / sphere_indents_count) * z)] sphere(r = sphere_indents_radius, $fn = top_rounding_faces cylinder(h = stem_height + nothing, = stem_radius, $fn = top_rounding_faces.

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