I can't recommend the TOS enough. I use it every day in my honing cycle. I use it after the Dalmore Blue, and do a 5/5 pyramid on it and the Norton 8k. I love the edge it produces. You just have to find where it fits in how you hone. They're also very rare. They come up on ebay much less often than Eschers. Contact Coully to get one. You may not get another chance.