I have been off of the forum for over 5 years now. Yes I have done the ceramic sticks, round files, sharpening the back side of the serrations with flat stones and dremel with diamond bits as well. All do an okay job but could all be better. It may have been 6 years ago or more that there was a prototype that one of the trusted members said he broke and the serration sharpener idea had disappeared along with my time to be on the forum. I had checked the web page to see if it may be for sale here and there over the years, but nothing.