Fired up the Jap stone today and after polishing for about 3 - 4 mins, I noticed of my marker mark was not being removed on the heel of the knife, but was everywhere else. I checked the truing and the right side was out of true. I've only used this stone one knife...So, I looked in this forum to make sure the truing tool can be used on the Jap stone and saw Mr. Farris had said, "yes". So, I took a tiny bit off the top. Once I got to that side of the stone, I could hear and feel the raised portion much more. It was working great, but at the end, there was a pop and I saw chunks come off. This is what it looks like now...What now?