Any suggestions? I've got a vintage Thuringian I could use. I've got a small DMT325 but I don't know whether that'd be good to use on it. I guess I could get a bit cut off the end because it's a big stone but that seems a bit extreme.
The DMT or take 1/2" off your stone with a hacksaw. I use my DMT plate on mine and it works well. The slurry stone I received with it is a joke (like a 1/2" by 1/2" piece). Unfortunately my stone is only 5" long so cutting any off is not ideal, but if I recall you got an 8" one right?
A thuringian would work too, though I think all the slurry would be from the thuri as it is softer than the Frankonian.