Have an existing Radio RA system in my home that is maxed out (maximum zones/switches). Am planning an addition to my home that will likely need another 7-10 zones. Assuming I can get more switches on ebay, can I just switch my time clock/chronos (RA-SBT-CHR) into bridge mode to gain an additional 32 zone controls or do I need to add an additional Chronos in bridge mode to pick-up the additional 32? What do I lose if I switch my existing Chronos into bridge mode?