The RAM ball mount system looks like a very neat solution. The components are all available on Amazon, including the ball mount which replaces one of the standard dash bolts with a discrete black ball.
(Now attempting my first link and embedded photo.)

Here's the thread recommending it, scroll down to the 6th post. (Thanks to Smaug!)

And here's the parts I have waiting for my M3W, which entered production this week.
[Linked Image]

Last edited by JohnMat; 28/02/20 08:44 PM.
2020 M3W