That looks fantastic, Darren - I think you are much more technically capable than I am!
Michael - thanks for the reply and I appreciate your point. I found a magsafe phone mount that plugs directly into the cigarette lighter and the position of the phone is quite good. It is a bit flimsy though, and vibrates a bit. I'm still looking for something better. Optimally a soft clamp on the square edge of the leather dash, but I haven't seen anything like that.