I would love to tell you but I won't. Take my word for it, there is a lot to it.
But 100%. We are doing it. I swear to you, and God, and all that is holy, we are doing it. And it ain't trivial. Peters is fantastic because they are responsive, competent, capable, and willing to do it. I have attempted to duplicate what we're doing in other places and Peters is the only game in town. They absolutely can and do. If I were doing it all by myself, I would be a very niche boutique maker with very minimal output because I am limited to only a few per day doing it the way I do it. They were not able to do it at first either, it took changes, but they did it, they got there.
I pay much much more for my heat treat than other makers do, but in the big picture it just amounts to little more than a rounding error (about the same as a few good ceramic grinding belts per knife) and I feel like we're still getting the best value out there out of it. It's expensive, but it's not ridiculous and it is worth every penny of it.
"Cpk" is actually a measurement of statistical process control. (Fun fact, I was a certified ISO quality auditor in a previous life) That's why I went with CPK instead of "Carothers Performance Cutlery". Which would have been a reference to something in China? I thought it was a better acronym. Because we are constantly testing for process control and Peter's has the best consistency, and it has actually gotten better over time. The work we are doing now is the best it has ever been.