I've recently bought a japanese waterstone (6000 grade) to try out and it certainly produces a fine polished surface quicker than a comparable oilstone. But however I try I can't avoid nicking the stone when I start sharpening a micro bevel on a blade. Then it takes me a while to restore the stone with the nagura, so I'm not really saving any time overall. Can anyone tell me what I'm doing wrong please? Many thanks Bill