Here is what I did.
Find a pallet edge protector or any thin L-shaped item. Chop off the mounting arm and screw in. I added a small piece of felt/hook and loop to the bottom of the Garmin. No bouncing around and is very solid. I also used a magnetic mount at one time in place of the arm in past vehicles. It worked well with out issues.
This is the best place to install. Easy to see and easy reach. Does not block the view of the road.
I primarily use it for posted speed signs, speedometer and upcoming roads. Plus, I can do voice guidance in a pinch if I do not want to use my phone.
I love having this at almost eye level. I do not like to look down.
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