Pro Tools 10 and HUI External Controllers

Does anyone here have any control surfaces that are successfully connected via HUI and could hopefully help me solve a deep problem? I am looking for someone who has a master controller and extention fader controllers, such as the MCU and MCU XT, for example... Or even best, all 4 midi controller sections activated.



Basically what I'm looking for is if when 2 or more surfaces are connected to PT, if all surfaces are sending and receiving the ping, or if it just the main control surface that's passing this data.



Thanks all!