thanks

i'm pretty sure i understand the slurry theory

i like the idea of a single stone, variable nagura

i'm thinking along the lines of theory 3 and 4...

how do i identify slurry stone friability, grit level, hardness?

each different slurry stone will have its own nuances/personality with regards to finished hone

? what are the characteristics of:

naguras, coticules, thuringians, eschers, any others?