I use a DMT E, BBW, and Coti progression on my razors, and love the edges that I'm getting-- to me, it's an even more comfortable edge than when finished on CrOx. The key to success, IMO, is making sure to use a very, very light touch when you move to the coticule. It took me a long time to exert enough self-control in order to do this, but it is well worth the results. Good luck.