Picked up a used Twister T6 for $400 and replaced the gear box for $100 and now its like new again.
ClimateIQ Product Documents
The 6-ROOM EXPANSION SWITCH pairs with the EXPRESS CLOUD GATEWAY to provide expansion capacity for up to a total of six (6) rooms and up to 60 ClimateIQ devices. Each room requires a U6 PRO ACCESS POINT. Pre-configured for ClimateIQ devices.