I think I recall some recent discussion about cabin heat boxes/valves but sorry to say, didn't pay close attention. But now, having decided to trash the hokey Lancair option, would appreciate suggestions for a good stainless alternative. Needless to say, space is at a premium. I have already made an opening in the firewall on the pilot side, centered between and just above the tops of the rudder pedals and just below the header tank. Aircraft Spruce shows several. I'm gettin' too old to reinvent the wheel, so thought I would plumb the depths of wisdom here. ):

Angier Ames
N4ZQ...still building