I seem to remember a previous discussion re WAF of multiple speakers on the ceiling. I don�t think I will ever be allowed more than 5 (with none on the ceiling) and fewer if I go down the SE route.

Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.