I've got an SB-900, SB-700 and several SB-80s and Yongnuo flashes. I want to attach the PocketWizard MiniTT1 to my camera and trigger the SB-700 with the PW FlexTT5. Then, I want that SB-700 to optically trigger the other flashes. I can't get that to happen. The Yongnuo flashes trigger, but the Nikon flashes don't. I'm using the Nikon D810 with the flash mode set to manual. If I use my popup flash and set the camera to commander mode, they all go off. I'm not sure where I'm going wrong. I've got all the flashes set to remote. Any ideas? Thanks!