Anyone who uses the DMT D8C for lapping their hones should feel free to respond here. Anyone for that matter who uses a DMT... Do you notice any wear on the diamond surface of the plate from lapping? I lapped 5 "different" stones today (4 Norton Grits, and one CHinese 12k) and noticed at the edge of the DMT, it looked as though the diamond had somewhat worn down and maybe it was just the Nickel visible underneath. Is this common? I don't see why the diamond surface would get "worn" since it isn't supposed to. Or perhaps this just happens with time and use. Any comments?