Lapping / Slurry stone question not covered in the Wiki

[MarkinLondon]

I've read about people using a credit-card sized DMT325 as a slurry stone, and the first thought that leaps to mind is that the same DMT is used to lap hones, so isn't it reasonable to assume that using it as a slurry stone creates an uneven honing surface?

I ask because I'm expecting a Charnley Forrest this week, and I know I'll have to lap it. I expect to use a series of wet/dry sandpaper. I've got a few sheets of 600 and 1200, but it might take a very long time with those grits and I'm considering purchasing a DMT to get things started. Of course, the DMT product line is downright confusing to me, so I'm sure I'll come back and ask exactly one is proper to use. I've also read about people using the Charnley with slurry, which sounds interesting to try, but without a matching slurry stone, I'll have to find another solution. But even then, I have no idea what kind of slurry stone can be used with a CF. The only one I've got is for my Coti, but using it seems counter-intuitive. Why would I spread a lower-grit slurry on my high-grit CF. Or, more accurately, why would I spread garnet on a stone which has no garnet? Wouldn't that defeat the purpose of using a CF? (I know, I know... natural stones can't be measured in grit size, but the logic still applies.)

What's the solution?

thanks,
m