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LOL... Back in fine form.

Never used a Chosera so can't talk about them.
I used Kings from 300 - 8000 grit for a few years & never had trouble with edges, just slow getting there. Swapped to Shaptons for more speed due...

Kings are one of the most popular stones in Japan for knives. They are however a 'soft' stone that 'slurry' a lot & need constant lapping & do soak up water.
No offence , you just need to know how...