The FPP pi projector plug in works with it, but ran into another issue that maybe xschedule would handle differently.
If the projector pi is a remote to the master, it will NOT just play a playlist even if an event tells it to.
Make the remote pi a standalone and it will play the playlist just fine.
What I need to figure out is either leave it as a standalone and figure out how to make it listen to the other channels to run the virtual matrix coming off the master or how to get a video to run independent of the show. Maybe a video as a back ground. don't know.
Will revisit the protocol after the holidays Keith, I had found it a year or two ago but do not know if I kept it. A lot of the protocol was in the plugin Ben has off the pi.