I have Jnats, Shapton, Norton and Naniwas plus the Escher and Ark Black thinking I got the progression tools until I watched Mastro Livi use a 3k to set the bevel, a Belgium Coticule and a Ark Trans followed up with his loom strop chromium oxide on linen and the skin on the other side. It took him 5 to 10 minutes from start to finish. I have 4 of his razors and they are ready to shave out of the box and the razors really hold their edges with minimum maintenance. I would love to go to his shop just for a lesson first hand on his stropping technique. Obviously he has been doing this for 60 years but it sure makes you wonder why in the world we collect all these stones when in the right hands you need 3. By the way, his loom strop is an amazing tool for maintaining a razor. You should see him restore a dull edge using only the loom strop.