Did you happen to ask Brian my question? If he said no, did you get a technically competent answer as to why not?
Once again, the answer cannot be used. There are two single gang boxes with 3-way switches in them and two travelers between. THAT'S ALL. Separate sensors and wiring to/from sensors IS OUT.
Fins, just trust me that the room can only work as I described it.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw