Will definitely try out this method! Thanks for the suggestion. Maybe I could not find a way to rout the Master to another bus in the previous attempts.
And yes, the Echo button does not respect the None selection for the inputs and that is a bug. I want when I say 'None input', no signal to come in the track, no matter how much a press the buttons.
Else, if Echo button should take priority for the sake of it, the 'None' label in the panel should change accordingly. Then it won't look and behave like it's a bug.
Track templates are a pain in the but. Sometimes I will forget and will thing a track is routed appropriately, but it would not be, so I will have to double check... no time for that.