So, in my particular case, my kitchen is quite large and has two radiators. I did think that I had to have one of the HR92's as the sensor and actuator (the Master) and the second one as just an actuator (Slave) for its radiator. Am I now understanding correctly that so long as I select multi-room from the parameters menu, I can have each HR92 set as both a sensor and actuator? I think this will be a good option as each end of the kitchen is prone to different temperatures.