How deep?

[BruceP]

With Catts, I ordinarily pot them with the "future root area" (I kind of like the positivity of that phrase) even with the top of the media. The tender emerging growths are, I think, more prone to attack by creepy crawlies (and then by pathogens) if buried even partially. In my mind, it comes closest to what the plant would do in a natural state. The plant will initiate roots in its time regardless of whether they are buried or not, so that isn't really a consideration.
Then again, it may be that I just like to watch the roots grow.
I'm no expert on cyms, but I think that they are planted a bit deeper (like what you're doing).