I use both (my Smartphone with Navigon and my GARMIN for the bikes.

I made a cradle for both.

Pictures in the TM foto section:

http://www.talkmorgan.com/ubbthreads.php/topics/338777/“Norway_Travel_Kit”_#4#Post338777

2005 4/4 1800ccm Duratec and a lot of HONDA CX500.......