#2. "RE: Can I use a sb-80dx in slave mode with a D700?" In response to In response to 1
Ok, adding some more findings. I remembered one thing, and that is CLS and SU-4 do not work together. The preflashes from the camera or SB-800 commander will set off the SB-80 before the other flash unit(s)go off.
So it's all SU-4 or CLS, not a combination of the two. Or go with Pocket Wizards.