stingray327
Member
You could also consider a seat bolt mount. I have used them in a variety of applications, and they can be had nowadays for scanner/phone use for about $25 on Amazon, or even at mountguys.com
Here's the Amazon link for the one I am currently using: Amazon.com: Arkon Smartphone Seat Rail or Floor Car Truck Mount for Apple iPhone 6 Plus 6 5 5S 5C Samsung Galaxy Note 4 3 2 Galaxy S5 S4: Cell Phones & Accessories
Took me 5 minutes to install in my daily driver, and holds any of my handhelds fine with just the stock holder attached. I will add that the stock holder isn't enough for a 436 if you have one of the bulky cases.
Come to think of it, this comes with a plate for floor mounting, so you could mount it to a desk or table too.
I don't want to mess around with the seat anchors because with my luck something will go wrong like the screw not going back on or get stripped whatever cause this is an old car. As it is I have to be careful of things loosening up and or falling off in this car so I don't want to contribute to this.