Search:

I use my DMT8C for all of my stones, there is no negative effect using it on the Naniwa 12k,
some do prefer a finer finish on there finishers and I have lapped my 12k on 2k wet dry and have seen no...

General rule of thumb is double the grit rating of the lapping plate you choose and that would be the coarsest stone you would want to lap with it.
the DMT8C is 325 grit so would safely do a 650...

Both will serve you well,
the Atoma in a 400 or the DMT8C which is 325
I have no experience with the Atoma however from what I understand is less prone to the suction as the surface is not...