Search:

If the Atoma is brand new, that's why you got done in 2 minutes. Diamond plates lap very quickly when they are new and the diamonds are still very sharp. My quite worn Atoma 400 takes quite some time...

It doesn't matter much on softer stones like Shaptons, Choseras, Norton water stones et al as long as the diamond plates in question are worn in a bit. Super hard natural stones like Arks are...