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Mike,
I just realized you are also on KKF, recognized the 10k JKS stone.
If that stone is anything like 10k Super stone you should be getting good edges from it to shave. Use a CrO or Diamond spray...

Jnats do not have grit ratings, so it is impossible to have a 10k rated Jnat.
The question is is it not giving you the edge that you like because you are not using it correctly or because it is not...