I see the 30K stone on Amazon for £200, I think thats the cheapest I have seen it.
Has anyone wrote up a " how to" for jnats, is it...put simply...a hard stone then different slurries to sharpen, maybe one rock and 4 nagura ??Still seems expensive. I've no doubt it works well (never tried..16k only) but you could also get a nice sized ozuko for that price. Bit of practice, scorching edges.