Originally Posted by sigma
It's interesting that the hole is isolated. One would think a concave grind would be consistent through the grind. As I said, though, it's not mine, and he likes it fine. I think it is problematic because it makes it very difficult to put a nice finish on the blade. You seem happy, and I think that is nice. You are obviously a good friend to JKI, though I have to say that you do them no favors with your behavior. You have a way of making Jon look like Mark.
Based on your fuzzy pictures, they're not. The first picture has concavity alone the whole portion of that blade. I can't tell by your second picture because it is fuzzy, but what I can tell is that the shinogi line is already messed up. So, whoever sharpened that knife didn't do it any favors. By the way, that "hole" you described does not appear to be the original finish on a Kagekiyo. The owner of that knife likely did something to that area.
You should really get your facts straight before putting your fingers to the computer. You do no favors to the public with your ignorance. As I explained, concave grinds are not unusual. Your assumption that it was a huge overgrind and a whole is probably based on your personal belief that most knives need to have convex grinds.
You have a lot of confidence in your opinion. Unfortunately, your opinion, here, was wrong.
As for your comparison of Jon to Mark, I've bought knives from Mark. If Mark sold great knives and provided great service, I would praise him as well. But, he doesn't. He doesn't sell anything near the quality of Jon and can't service or personally repair anything he sells. Perhaps you should see Jon's store or buy something from Jon before making any assumptions or comparisons of Jon to Mark. By the way, have you bought anything from Jon?