Thanks for the photos and overview Andy! I look forward to hearing how it works out for you
So in the months since I've last posted, I've tried many, MANY different mounts. I have finally come up with a system that I am extremely happy with, so I wanted to share.
Anyone potentially interested in the following should know that while it is not inexpensive, compared to everything else I've tried it is far and away superior. The stability and flexibility offered is so far beyond everything else I tried, I think it is definitely worth the money.
OK. Enough preamble. Here are a couple of pictures.
One for perspective:
And one up close:
The basic system is a Ram mount system, available for about $48 on Amazon. To the basic system I added some pretty obvious extension pieces--the long double socket arm for about $18 and the Ram double 1-inch ball adapter for about $13.
But what you are seeing as the phone holder is not the typical Ram X-mount holder. When I first tried the Ram mount, and saw how stable it was, and realized I could get the phone in a position I liked, without blocking my view, blocking the vents, etc., I knew this was the mount for me. But I did not love the X-mount, and the fact that there really was no way to get the phone in and out of that with one hand.
More than one of the mounts I had experimented with had phone platforms like the one you see pictured. I checked with Ram, and learned that not only did they not make anything like that, but they had no plans to. So I started to think about how I could fit one of the platforms from one of the other mounts to the Ram mount.
I still had the G-cord cup holder snake-arm mount discussed up thread. I thought the "ball" on the end of the snake might just screw out from the snake, and then I might be able to find a way to screw it in to the Ram mount somehow. But I could not disconnect that ball from the snake. So I measured it, and discovered that it was 11/16" in diameter. The G-cord mount now costs $20 on Amazon.
I then found this on Amazon:
It's a Ram 1-inch ball with 1/4 inch 20 male threaded post for cameras and cost $7.50.
So all that was left to do was to find an 11/16" ball with a 1/4" 20 screw thread. It turns out that was easier said than done, but I wound up finding one at McMaster-Carr. It was under $3, but with shipping about $9.
So the total cost of this "custom" system would be about $115, and you'd have some parts left over.
All the URLs are below if anyone is interested in replicating this. One advantage of the Ram system is that all sorts of accessories are available for it, so you can use it for other things in the future, or at times when you're not using it as the phone mount. For example, they make a GoPro ball mount that just pops in on one end.
As for power, I don't usually need to charge my phone in the car, but if I do, I can either run the cable across my lap, or just sit the phone in the center console. It's not ideal, but it's a trade off I'm very happy to make, in light of everything else.
Feel free to ask me any questions.
It took me a long time, but I've finally found a mounting system that I'm really happy with.
Ram Mount System -
Amazon.com: Ram Mount Twist Lock Suction Cup Mount with Universal X-Grip Cell Phone Holder, Black: Car Electronics
Ram long double socket arm -
Amazon.com: Ram Mount Long Double Socket Arm for 1-Inch Ball Bases: Car Electronics
Ram double 1-inch ball adapter -
Amazon.com: Ram Mount Double 1-Inch Ball Adapter: GPS Navigation
G-cord extra long arm cupholder mount -
Amazon.com: G-Cord® Flexible Extra Long Arm Cup Holder Mount for iPhone and other Smartphones: Cell Phones Accessories
Ram 1-inch ball with 1/4 inch 20 male threaded post for cameras -
Amazon.com: Ram Mount 1-Inch Ball with 1/4-Inch 20 Male Threaded Post for Cameras: GPS Navigation
Red Phenolic ball knob - 1/4" 20 thread, 11/16" diameter -
McMaster-Carr