Upload & Sell: Off
Not sure if serious.
I need the SB-900 on camera to light my moving subjects from the front. The two remote flahses will be on manual, so I don't need the control of the AC3 and worst case can use my on-cam SB-900 for that duty as well (just not as handy as the AC3).
Yes, I was being serious, and it was in response to your comment thus:
I was hoping to be able to use my AC3 on camera but forgot the TT1 has to have a flash on top of the hotshoe to connect, so that's no longer an option.
Since the AC3 supports both Manual and Auto (TTL) I'm still not sure why you think the TT1 needs the SB900 instead of the AC3.
Obviously if you 'want' an on-camera flash then fair enough, but the AC3 is supposed to replace the on camera flash if you don't actually 'want' light from your camera.