here is a better look at it from earlier in the summer. (see attachment)
I also have a mount on my motorcycle. I did experience some problems with vibration. The unit would just shut off for not reason, or thats what I thought. Turns out, the batteries were losing contact for a brief moment, just a split second, and it would shut off.
I called garmin to ask them about this. They knew right away what the problem was. They asked me to send it back so they could put new (redesigned) battery contacts in it. Since then I haven't had any problems with it.