iPhone 6s Otterbox mount

I originally made this a year ago for the iPhone 5 Otterbox defender, which I never shared as there were several versions. One mount for the door for my printer, one as a holder for my passenger side headrest to keep my daughter entertained in the car, and another as a mount on the wall for charging.
This current design has been revised for all three uses. The three holes in the internal face accept M3 screws for mounting to a wall, acrylic, or any other flat surface. The Pair of holes on the t