Akis you might be right.
I tested last night without slurry seems to do nothing, consistent slurry I just managed to do only with diamond, has become something else, but I still did not seem to finish, my Escher bout seems to be over this.
In order to improve the cut, I used soap, maybe possibly to do more but after a lot of passes. By the way, the bevel left is mat.
In use, it looks like scratch, your brain gets the noise.
In conclusion I think I'm returning that it's not over Escher and I'm expecting a good Japanese.