At this time, I would like to ask someone from Shapton who knows the materials to help clear up this mess. I know getting a scratch left out by 16000 has NOTHING to do with the great advice the leading authorities of modern Straight Shaving have given us regarding how to get the best edge. That is why this is Advanced Honing as it entertains this way out stuff that only very few people wuld fing practical or useful. Sometimes these excercises can help clear up questions, but read and respond at your own risk as it can confuse more than help.
Again, if a Shapton rep does not clear up the confusion regarding the material differences of the glass 8000 Jp and the pro8000 I would vote to torch this thread and sorry for the confusion.
Respectfully Yours,
Mike