I've got a full set of DMT benchstones (from x-coarse to x-fine), and I'm thinking of picking up some of the spyderco ceramic benchstones. I'd be interested in hearing some user opinions about them, though. How do they compare in roughness to the DMTs? I presume the x-fine spyderco is much smoother than even the x-fine DMT, though I'm not sure how much of a difference it'll make to a finished edge. Anyone have these and care to coment?