I spent a lot of time making a bracket for the heater valve, virtually finished it, then thought better of it. With the hoses attached to the footwell panel with cable ties and a locating hole in the panel everything is held rock solid & its a far simpler solution:
This time again I have 5/8" hose on the engine bay side for the take off, and 1/2" hose on the heater matrix side for its outlets:
In situ:
And the cold feed hose coming up to the bottom matrix fitting: