This is the first time I've tried recording in Cubase SX. I got the recorder function up and running a few weeks ago in preparation for this, but then realized that I've been mixing down to WaveLab on the same machine. *oops* Time for more testing.
So I've got the sound running out of Cubase, through my d8b, and back being recorded into WaveLab. So far, so good. Keep your fingers crossed.