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I have studied the table and worked it out as follows: 1st column is for honing results, 2nd column is for cutting speed in relation to grit size, 3rd column is for wear of the stone itself, 4th...

Thanks Redwood. I got confused by the difficult rating system Herr Ulrich uses.

Thanks Redwood, interesting comparison!

Herr Ullrich doesn't rate the Apex 820 very highly with only 2 pluses!

Thanks Randy, I had in mind to try one out if no one could have told me anything about it.

Has anyone of you ever heard ot Apex stones? http://www.apex-schleifmittel.de/english/dressing.htm

Apex recommend their finest dressing stones for straights!