smartphone car mount for air vents

Mount a smartphone to the vents in your car ... this one fits my HTC 8X. I designed this mount in [Onshape CAD with parametric dimensions](https://cad.onshape.com/documents/e15f84a41b5688cff16715c0/w/02f0f6b68bce17096452970d/e/c7f30e74192348c358276c89), so it can be modified to fit other phones.