I feel for you all that this will affect.
Cannot for the life of me see why the head unit could not have sat nav built in or why there's no simple connection for CB or other.
On a different matter:
I purchased a universal fitting brake disc lock only to find they won't work on the floating calipers 2000 miles away when it was needed. So, it's only $50 but why wouldn't someone just try it out on all discs beforehand?
You would think they'd test, test and test. Oh chit NO, that's what the german and japanese manufacturers tell us they do. And most of the time they do.
HD owners just appear to put up with the disappointment - what's up with that? Easy, we forgive a manufacturer with heritage, a unique product and a long cycle, heart pulling buying decision that makes no sense when you stack their product up against another motorcycle manufacturer.
It's a true love / hate relationship that we all fall for.