Thanks, Tom, that's a lot to think about. I'm not going to say the cold-water tap is cold here in the twin cities, but I will say it doesn't take long to freeze a fresh ice tray.

One other item related to hot water is a regulated mixer valve in the shower. It would seem to save a lot of fiddling, and I can't imagine they cost a whole lot. Do you know if anything like that is widely available?