I mounted my phone holder (I use the phone maps for nav) on the right side, along with a bluetooth module inside the fairing (connected to aux) so that I get directions spoken to me through the speakers. I wear distance glasses and can see the screen, but its a wee bit blurry, so rely primarily on the speakers. I'm already streaming music via Pandora, via bluetooth, so the spoken directions merely override the music momentarily.
Not sure if that helps or answers any of your questions though.