My Aritsugu has a similar edge, at 10 dps since the last sharpening and I really love it. The difference in sharpness due to the low angle is apparent every time I use it. I was able to sharpen my sister’s Aritsugu to 7 dps by using the LAA. In any case, you’re not obligated to stay withe the factory angles.
I have a Wuesthoff Santoku with the Grantons (?) and I am now (after about ten or fifteen years of use) at the point where the grooves will touch the edge. The grooves are staggered from one side to the other, so it probably won’t get divots in the edge at each groove, but it’s really close. For sure, there will be some really thin spots, and maybe a little wave at each groove. The next few sharpenings will tell the tale. If the edge fails because of the grooves, I still will have gotten a lot of use out of it. It looks to me that the grooves on the Dalstrong are quite far away from the edge, so I wouldn’t be concerned about life being limited by the grooves.
Do the grooves work? I think so. Particularly when slicing hard veggies like potatoes, which really like to stick to the blade. For softer stuff, I’m sure there’s no advantage.
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