Haven't been able to identify all the other P25 secondary channels related to west side fd yet. At some point I have seen 453.5375 active with a nac of EE9 which I thought was PD and it was encrypted. I haven't been able to pick up 453.475 recently but I am guessing that is also a PD channel
I believe 460.4125 is the main since when they were still migrating over and had the patch to their old 800 mhz channel, I would see 460.4125 active at the same exact time as the old 800 mhz channel.