This is just a continuation of more problems I'm having with this setup and it gets more bizarre and ridiculous ! I just did a quick test of TTL using two remote SB800s on TT5's with an SB900 on a TT1 mounted on a D3x. First off.. strange pops of light for no apparent reason when setting up, not such an issue, but weird. Then there seems to be a tendancy to full dump on occasions or no sync at all on changes of ratio, which can be lived with, as long as it's not constant. I also had a case where the D3x wouldn't activate or wake up the SB900 from standby, no matter what shutter button, body light anything could fix apart from a shutdown and reset of the SB900. But then, even more bizarre.. after trying TTL with two remotes, I switch from TTL using channels A and B to using single channel A, now with both remote flashes set to Manual 1/4 power each.. and I get no sync with the remotes whatsoever - Nothing. The on camera flash fires 1/128 as set. But the remotes do nothing. I removed the on camera flash and tried that. Still no sync. Switch everything off, reset each of the remotes, reset camera, without SB900 in TT1 hotshoe, remotes now work. OK, add the SB900 flash - and the remotes don't work again. Turn everything off again and start from scratch. Remotes first, with the flashes switched on first, then the on camera SB900, then the TT1, then the camera and... still doesn't work!! The on camera flash works. The remotes don't. Am I getting angry and the client getting grumpy? No, because I'm just testing this and the only thing that's happening is I'm getting angry.. but just imagine ! Remove the on camera flash, remotes still don't fire. Reset on camera TT1 without an on camera flash and the remotes fire. Don't expect to use a flash in the hotshoe of the on camera TT1 and use remote manual flash at the same time. It just doesn't work. This doesn't work with D3x, D2x, D7000. Does anybody have this working with any other camera ?