Also regarding lapping/flattening other stones. I've read on many kitchen knife forums that they recommend the XXC or the XC dmt for flattening. (the Xc was the favorite before the XXC was released). I have no problem with using an XC (220 grit or similar I guess) on a 1-2-4k stone, but on a finisher like a 12k.. Well then I'm a bit sceptical. But then again I have never tried it and I only have 1 stone for now.

What do you guys use to flatten high grit stones? Anyone tried using a an XC dmt? What was the result?

I'm a bit hesitant to buy 2 different dmt plates.

I would only use my dmt for flattening since I have another special mini stone made out of boron carbide for chamfering (norton norbide), its like no 3 on the hardness scale after diamond and cbn. And its a solid stick not a thin coating on a plate. Mine has a rough surface. When I initially got my UF I chamfered it with a triangle white sharpmaker stick, and it took forever. But doing the same with the norbide took me like 1 minute and no precious diamonds got dislodged from some plate either. The norbide showed zero wear after doing that too.

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