Mark,
The component to control flashes from your camera with the JrX has yet to be released (I believe as I stopped checking a while ago). It's apparently a "cube" that goes below the flash unit that plugs into the JrX. Great, another item to take up space in my already full bag.I have a couple of the JrX receivers and one of the transmitters. They are plenty handy in manual mode, have plenty of reach but I find myself wanting to get the MiniTT1 and Flex TT1. Simplicity and more control.