I wasn't sure as the Shobu seems a bit soft.
I took a razor I had recently finished on a 20K and did 2 Diamond slurry regiments. Working the last one a bit more and thin in the end. Still about the same as the others razors as if this is the most I can get.
"I feel" that the slurry breaks down after about 30 - 35 laps but this is just what I'm starting to feel. So, if I did 150 laps like in my first trials, I think I was wasting time and not getting anything from it. I have other razors to test shave tomorrow so my Jnat edges will need to wait a few days for testing. I did 5 razors on the Jnat and with a few different starting points. They all seem to be ending about the same place. It might be just enough but I won't know till the shave. If I have to I guess I will need that 20K after to bump it up. I really don't want too but if it makes the difference. :shrug:
I did see a nice wide stone on JNS for about 120 bucks. Level 5. I will wait and see how things go for now. I need to quit looking at new stones! eBay has some too but I just don't trust the sellers. It's easy to get over on me without me knowing a lot about the stones.