Pixel 2 mounting case for motorcycle handlebars (or other uses)

Mounting case for a Pixel 2 designed to accommodate the phone with the Newdery auxillary battery case found here :

https://www.amazon.com/gp/product/B07CCG3ZC5/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

The mounting bracket was designed to repurpose an old handlebar mounting bracket for a previous phone. It is glued into the main body and can be modified for other applications.

The case is held together using silicone rubber bands for hairstyles (ponytails, etc.) and can be found commo