First off I finally wore out my gray stones. Make sure you check these if you reprofile a lot of knives. Eventually they will not work right when they develop a low spot in the center. It made working with them imprecise. But that's to be expected. I also know they sell stones separately.
Also over time from exerting too much pressure with big blades, I developed a lot of play on the stones in their slots which actually changed the angle to greater than 40 degrees. Moving back and forth actually wore the slots and the stones no longer fit in them tightly. Finally yesterday the base cracked between the slots the two stones slide into on the 40 degree side. Not blaming spyderco, because I put too much pressure on the blades over a long period when sharpening. A bad habit. So I whipped down to my local gunshop and bought a new one. The difference was startling. Much more precise to work with.
Also over time from exerting too much pressure with big blades, I developed a lot of play on the stones in their slots which actually changed the angle to greater than 40 degrees. Moving back and forth actually wore the slots and the stones no longer fit in them tightly. Finally yesterday the base cracked between the slots the two stones slide into on the 40 degree side. Not blaming spyderco, because I put too much pressure on the blades over a long period when sharpening. A bad habit. So I whipped down to my local gunshop and bought a new one. The difference was startling. Much more precise to work with.