I know, this may sounds odd and look weired. Nevertheless I still want to ask. Has anyone tried using the commander in the camera body to trigger the speedlight on the flash bracket? Most people don't like the built-in commander because it may add a little light even though it has been set to "--". Since you are using the bracket, the flash is going to be in front of the subject anyway, so I guess the weak flash emitted from the body shouldn't matter, should it?