This actually worked really nicely. Since the rooms are not perfectly square, each side of the ceiling needed to be unique complex profile. The general shape of each profile was similar, only the distance to reach the center of the room changed. Sometimes the simplest solution is one that has been around in AC for a while! Duh! Thanks for everyone's input.
-c
16" MacBook Pro M1 Max
Mac OS 12.2.1
ArchiCAD 25 Build 6005