Tis is my 2. hone. I think it is a 4000/8000, but what brand I don't know. The problem was that there was a little hole in the middle of the hone. About 2mm...

The was the first time I was lapping a hone when I saw this "hole". Anyway, I only had sandpaper, so I used A LOT sandpaper and the damage was gone in about 3 hours of lapping.

So for future reference I was wondering if anyone has an idea on how to make this process faster?
I have a lot of patience, but this was really gnawing on it...