I have been sharpening my kitchen and pocket knives by hand but am looking for a method to sharpen my serrated knives and a knife that curves inward prior to widening out toward the tip. All my methods use wide sharpening surfaces (3" waterstone, sandpaper on glass, large diamond stones, etc.). I'm not able to maintain my bevel angle while getting into the curve of the one blade. I'm assuming I need a narrow stone? Is it possible to use the edge of the wide waterstones with a lanskey-like rod guide? I'm thinking that building a jig would be fairly simple?