LCS, ASC2, STM2, Remote and Remote/Command Switches

No conflict. You could program very switch you have to the same ID, they just fire when that command is sent (ASC address or direct Fastrack command switch ID).

I use that for scenarios like 2 switches that cross over between 2 tracks. They always should either be straight or turnout to cross- saves me a switch ID.

EDIT- I will add though, if you want to use the switch monitor, then each switch, the yellow RSC/Lights terminal must go to an individual input terminal of the switch monitor LCS module. So again, you can absolutely do what you described- use an ASC module, use 3 actual addresses, then assign a command fastrack swich to the 4th ID, and the switch monitor LCS module will work with everything that way.

Just do not ever connect 2 switches RSC/Lights wire or terminal together. That wire or terminal goes 5V positive or 5V negative for status, and thus 2 fastrack switches if they ever were different state- one trying to go +5 and the other going -5 would be bad. Again in the scenario I gave, you would have to only monitor 1 of the 2 switches numbered the same ID.

FWIW, the monitoring real time display update aspect of the STM2 switch monitor is what really sold me on LCS as a system.

That's the fundamental game changer- actual real status- even if anti-derailing or even manual moving of a switch- fastrack switches report their real state with the internal limit switches, and the STM2 then real time updates your LCS layout display.

I had visions of either using a tiny LED video projector to display on the wall, or use an LCD TV, with an iPad and video cable, to display the LCS layout screen live status of the table. One of these days, money, time, and just the work to get it all up and running, I hope one day to implement this at the local club too. Old used ipads- even one with a damaged screen bought extremely cheap- can be the source for one of these display only status screens.

Thanks for the info, Vernon.

I have an older Ipad for running LCS, but I am not an Ipad (actually anything Apple) fan.  I have also bought the license for etrain which also captures switch status from the STM2.  Once I have my layout up and running, I will try using etrain to see what it offers over the Ipad LCS app.