I have a Chive (non serrated, plain slightly curved blade) that I would like to sharpen and am currently using a Lansky diamond kit for all my other knives. I went to Gander Mountain to pick up a Gatco dog bone sharpener and then realized that Lansky makes a serrated triangular stone for my kit which has a fine texture to it, I believe it's ceramic. It looks comparable to the Gatco in texture. Then I read in one of the Lansky kits that they also make a medium stone for serrated blades. I sure could use some advice whether to buy the fine stone or the medium. Thanks.