Well, I'm a bit late, but yes, I did buy and install that mount on my '17 DL650. Vibrated the GPS so much that is was not usable. Not recommended.
Which mount are you using, Adventuretech?I have the mount AND have a Givi Airflow; no issues with buffeting nor vibrations. '18 DL650 XTA, but I use RAM Mounts Universal Spring Loaded Cell Phone Holder with Diamond Base Adapter - RAM-HOL-PD3-238A, not the X Grip one.
That mount and windshield are my favorite mods!
Any chance of some photos, thanksI have the AdventureTech over-dash mount on my '17 w/ Givi Airflow screen and I'm pleased with it. Wasn't happy at first due to how much the GPS shaked, but once I adjusted the RAM arm more vertical to put the weight of the device over the mount instead of stretched out towards my head, it improved drastically. I also double bolted the mount to the windshield bracket with extra bolts and nuts -- fastened in 4 places. I think that helped too.
Also, there is no wind or adjustment interference with the Givi shield.
That's actually not a bad idea. I mount my phone on the handlebar with a RAM, and my GPS with the ADV Tech dash mount.. My phone is far more capable of finding hotels, locations, stuff, etc than my Garmin.