It’s worth reading up on Sigma as the different types are intended for different things, pretty sure it’s on Stu’s tools from Japan website.tom many thanks for pointing me to dieter scmidt. these have a large selection including sigma.
Shame you aren’t closer or you could come and try some of my finer stones. As you will have done all the work to get sharp on the coarser stone, the difference in Fine stones is mostly the feedback, and to some extent the cut speed (unless you’re into polishing in which case the surface finish left becomes a big factor)
The king is towards the softer end of the spectrum, with ceramic stones up towards the hard end. I’m not a fan of the very hard stones for free handing as feedback is limited, ymmv though