i have a tri hone washita stones labeled course medium and fine. I also have dmt diamond bench stones in course fine and an extra fine on the way. Most of my knives are 440 series or 1095 with one new one in s35vn. I also have a set of kitchen knives in an unknown stainless that sharpen better on the diamond. Would a true Arkansas hard or other extra fine stone add much to my sharpening equipment or be a waste/redundant.