So I haven't ever tried the hollow grinding method and I've never used this tool, but my question is if you sharpen your heads this way is there any tool that works to touch up your heads in the field or if you are on a hunting trip. Or do you just have to have enough heads with to swap them out if you need to? I'm quite interested in this sharpening method but I haven't been able to get past that hang up. Right now I can carry a stubby jewel stick and be able to touch up anything that needs to be without too much clutter.