I've always just used what I've had for stones, so my knowledge on the subject amounts to almost nothing. I am looking to upgrade to a diamond set. I need something for my small pocket knives, kitchen knives, and ice auger blades. My new EDC is 110V and it's not easy to sharpen, so may have been the final push I needed to upgrade my sharpening.

I like my knives sharp, but I haven't found a razor edge to be all that long lasting, or totally necessary. I've also never had to use a coarse stone on a knife. All my sharpening has been touchup to get the edge back, so I am wondering if all I need is a fine stone. I've never used diamond, and all my stones are second hand, so I'm not even sure where they would be classed. I'd like to hear your thoughts on what's necessary and good to have.

I was considering a DMT Duo-Sharp stone, but don't know what I need for coarseness. Or if that's even a good way to go.
https://www.highlandwoodworking.com/...rsecoarse.aspx

Second, I'm intrigued by the DMT sharpening system. I can't decide if it's a gimmick or something useful. I've found that keeping the factory edge angle is very important on the ice auger blade, and was thinking that system might be useful. Has anyone ever used this, and what did you think?
https://www.homedepot.com/p/DMT-Diam...LUXE/307438558


The eze-lap diamond stone looks like a good solution too. I run into the same questions on coarseness of course.
https://www.highlandwoodworking.com/...-set-of-4.aspx


Thanks.