I've got some large RTUs that the customer is using a DOS Service Tool to access. There is also a Trane BCU with more TRane rooftops. My questioin is more about the Carrier units. One or two units have a 6400 module in it but one has a OEM circuit board running the unit (50EK). Ripping out the 6400 would be easy but the board I am not sure about. Without it I think I would have to control EVERYTHING (I think it is doing unloaders and condenser fans) I am comparing trying to integrate with a Jace or replace with our brand. Is the CCN just a regular RS485 I can tap off the Jace? Are the drivers public? Any thoughts helpful. I think putting in a JAce now would make the Trane integration easier later.