I think you'd be hard pressed to find a honemaster who would recommend learning to hone on a slurry stone. Larry has some good deals, but IMO this is not one of them.
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I brought this stone just before starting to hone and actually did my first razors on it. The 3k is probably pretty accurate but the 8 I would say is more like 7. That said I did do about 5 razors using this stone after bevel setting and before my dubl duck barbers hone and the razors were all good shavers. Its quite a soft hone and needs lapping frequently. I ended up getting naniwas and much prefer these both for feel and the edge they leave. Ed
If you use this hone yo should only need to finish the razor on the 1x3 8k side so will be a fair bit easier as it will almost be there already. Good luck. Ed