Mokka DIY - Central Air Vents Phone Support - iPhone 7

Due to the fact that I recently change car, and to the fact that I bought a Opel / Vauxhall Mokka without the integrated Navi system ( No money, no Honey... ) , I had to solve the problem of how to install my iPhone on the Dashboard for use it as Navi.

The phone had to be placed in a quite accesiible position, and without modifications to the dashboard ( I could have used a suction cup support installed the windshield, but... If that, what is the point to have a 3D printer??? ).

So I start