Thanks for the tip!
I had a Naniwa 1k / 3k waterstone combo (not the Superstones) that I kept when I sold my superstones. I finally got around to separating the combo, and cutting the stones down thinner. I took the cut off parts and cut them each in half and beveled them up to use as slurry stones.
I just made a slurry on the 1k this morning with a cut off chunk of the 1k. It made a real nice slurry. It cut a bevel into a couple of razors about as quickly as I have ever been able to set a bevel.
So... No more bevel setting on the Coti's for me.
But... I still ain't givin' up the coticules!