Thread: Some questions about lapping Naniwa stones

I current hone with a Naniwa stones: 1k, 3/8k and 12k. I have been lapping with 400 grit wet/dry sandpaper on a flat glass plate. I would like to invest in a stone to lap instead of sandpaper.

I have a few questions:

1.What is the best kind of stone or plate to lap Naniwa stones?
2. Can I use a Norton flattening stone for lapping Naniwa stones?
3. I see there are DMT DIA-SHARP BENCH STONE, 8"X3" There is a coarse, fine, extra fine and extra extra fine. What would the "grit" of these stones be? Which one of these stones, if any would be suitable for lapping Naniwa stones? Or bevel setting?

Thanks in advance!