Hello,
The CTIS I have is from a french manufacturer. The name is Teleflow
http://www.teleflow.net I bought all the rotary valves, the main control valve, and the touch screen controller. Also bought from them a bulk of hoses, connectors and a crimping tool to be able to assembly the houses to correct length. All the hardware and mounts were built here as per prints supplied by Teleflow and sent to hot dip galvanizing. The system works perfectly, it has 4 setups, road, dirt, mud, and emergency. You program the desired pressure for each one and the system checks and compensates at given time intervals. To change from one setup to other, just one click on the touch screen. The rotary valves are exposed, so bought 6 to have two spares in my toolbox just in case.
The assembly to the Hutchinson rims required to do a small modification to the brackets design. The design provided by Teleflow was intended for the OEM rims, but no big deal.
The air supply is from the trucks brakes system, but it is connected to a truck's port specially intended for accessories that will not compromise the brakes (as per MAN's body builder handbook). It won't continue to supply air to any accessories if the pressure goes bellow a safety value.
So far, very happy with the system and with the assistance provided by Teleflow.
If you need more information, please let me know.
Best regards
Felipe