Was wondering what PLC you are using in your Wiring cabinet if you have updated from the Etherten with the stacks yet that was sitting in the plastic container? It is probably the only sticking point for me for setting up the wiring hopefully in the new house we planning to build. and running it all back to relays. The WAF(wife acceptance factor) of having something like that would probably not pass. I would prefer to do something like your place but if it was a bit too DIY it maybe easier to use zwave modules in all the light switches even with the cost being crazy.