Tudor,
Thanks so much for your thoughts!
Yes, that was exactly how I was thinking of using it. In fact, I (also) re-installed KeyCue, because that shows me all current/active mappings in any one application/the Finder; and I'm leaning towards making use of the remaining (unmapped) keys wherever and whenever I can instead of adding complexity.
I did, Yes. Although it was different from yours, and really is my next question 
My macros each use a hot key to trigger them (e.g. ctrl+Option+Cmnd+F for the flat symbol (music): â™).
The macro's Action in each case then pastes the ascii character in question (e.g. that â™) from a named clipboard.
Which means many clipboards; I suspect that's not considered best practice?
But for something like the flat (â™) there really is no other way of doing it - except, perhaps, I suppose 'f' with preceding and succeeding spaces!
Very much so, thank you. I'm just wary of creating and so naming multiple dedicated clipboards. Should I be?
This could be done more easily with something like TextExpander, of course. But I want to try and stick with KM