I'm planning on getting started with sharpening with benchstones (I've had a sharpmaker for about a year now), and I was planning on ordering the DMT Diafold Fine/Coarse and the Fine/X-Fine from New Graham. Should I also order an extra coarse diamond stone, or is the Coarse side of the diafold good enough? I do have some knives in steels up to VG-10 that could use reprofiling, so would the coarse side of the diafold take long enough for an extra-coarse stone to be worth it?