i like to use lots of diffrent sharpner like dmt stones,spyderco sharpmaker,edgepro,and norton water stones all have thier ups and down like the norton stones cant realy sharpen 154 cm or cmp-s30v,and the sharpmaker only has 2 angle guids 30',40' ,the edge pro is a realy epensive sharpner that works great if you use it right and the dmt work ok to get a shave edge on all purpose knives from a buck pocket knife all the way to your dog father the only problem is that the lose thier diomand texture after a while so juat find the right sharpner that fits your needs