Hi, I have a bunch of King stones in various grits, 240, 1000 & 6000. I've had really good success touching up knives with these however I really struggle when the knife is pretty dinged up to start with or the profiles are janky. I want to buy an even course fast cutting stone to just establish the angles and even rapidly remove material to clean up an edge (I sharpen wood working tools like Chisels, plane irons & axes too - and they sometimes require me to remove a lot of material before they are ready for polishing grits). Until now I've been using the 240 grit to do this but it takes ages and as a result it's also started to go concave and it now transfers that imperfection onto certain types of edge - especially plane irons. What I want is a rough cutting stone that will stay flat for a long time to get that initial angle, then I'll just polish it out with my existing stones. Extra points for something that I could even use to "flatten" my existing King Stones. I think I need something like a Diamond sharpening stone, but I am not sure which brands are suitable for my needs. Can anyone here recommend anything suitable for my needs. Cheers.