I canīt comment on that.
Reviews and my experience show that sharpeners like the Sterling are not the best way to sharpen a knife. Thatīs especially true for high quality knives. I would use mine only in a real emergency. Most forum members seem to prefer diamond sharpeners of various designs. Most of those sharpeners canīt beat the weight and size of the Sterling though.
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If it isnīt broken, it doesnīt have enough features yet.