Hi John
Ooooh, Australia! - nice one - lovely spot. - but I won’t ring you up in the middle of your night!
Facetime?
Sounds like you’re nearly there with the playing technique…
That missing barré you can correct or create as follows :-
If the popover produces no result, you may find that Popover text has not been entered properly. Worth checking that it corresponds to what should be entered.
To add a ‘glyph’ - e.g. C15 - click on a similar playing technique (say CI) then the Plus sign down the bottom to create a technique based on C15.
Now click on the pencil tool (Edit Composite) and a new window opens.
Choose Text-> Style-Playing Technique font. Enter (e.g.) CXVI then OK.
Put c16 in the Popover text, click on the star so it’s filled in to make it default then click OK.
You have now created (or altered) a new barré popover.