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Quite so. As far as stones go, the 12k Nanny is about as good as it gets. I like film, but it's not much "better" except that you never have to lap your film plate, so it's always consistently flat....

Best place to start, IMHO, is with good quality synthetic stones, or lapping film.

But if you narrow the scope as you have in the question, to just naturals, my vote is split between arkies and a...