Great info thanks 
As I said it has evolved over time. I now have daughter boards on daughter boards. So it’s a bit of a dogs breakfast. But it works and I have no plans to upgrade it any time soon.
Love the idea, it’s a organized solution to supply low voltage power throughout the house. Would it be possible for you to post some schematics or a more detailed “how to”? It’s a great help for those wondering how to supply their projects?
I’m one of those people that just started putting stuff together myself: learning by doing…
Tom, I’m typing this from my phone, so you’re faster to respond to me than I am in finishing my post 