...although to be fair, I'm a retired Chartered Town Planner not a project planner.  If I had been a project planner, I'd have made sure I installed the DCC Concepts track controlled signal before I did any ballasting.

I know they say it's designed for clip-fit compatible set-track but it can be made to work on PECO flexi track.  Just make sure you get it set up before you start flinging glue and loose rocks around like coke at a banker's ball.  After a lot of self-generated difficulty I eventually got the signal to work, and take commands from the Multimaus controller.  Luckily, being a single bi-di platform will mean the signal will spend most of it's time cycling between red and green, I say luckily as they are both on the same accessory address, but if I want to show amber, I need to dial up accessory address 2.

It was worth the effort to get it working, it will add a nice little touch particularly in low light conditions.  

So, as a change from the norm, here's a video I put up on the Face of Ache showcasing the operation.  I still need to finish cleaning the track and I think the 150 could do with it's wheels cleaning, it's ex King's Oak so hasn't been active for a while, at least until I converted it to 3 car.