So here is where we stopped for now up in the bathroom. I'll make the connections later. It will be a big rushed job because I have to shut the water off to the house and need to make about 100 connections before we can turn the water back on again. Basically a day without plumbing.
And this is what it looks like inside the upstairs bathroom wall. See all the drilling I did without ever breaking through in any of those holes? This was while all contorted inside a freaking cabinet.
More as this project progresses. Maybe this weekend.