Sonny, I often only go as far as the 10k before I go to a natural. I have a theory that the further you push the edge, and the more hones that you use, the shorter the life of the edge. It’s just a theory. Some day I may get an experiment going on. So I’ll be interested in what happens long term with your razors that have gone 15k and then natural, versus 10kand then natural.