I carry a Letherman S2 and Benchmade MiniGrip on me and sharpen them about once a month. (with a lansky) Would one of these 10 dollar sharpeners put an edge on either of my knifes? I would like a way to keep my knifes sharp in my everyday bag, but I just have a feeling a will be taking a step backwardsIf I tried to use that on my benchmade…