This is a simple adapter to capture the handlebar mount, and attach it to something flat. My intended use case is a Scosche magnetic mount; I'll stick a metal plate to the back of this and it will go on the existing magnetic mounts. But this could also work with any stick-on / VHB tape.

This part has some clearance built in and doesn't require a tight fit. I printed in a fancy TPU but any sun- and heat-friendly material should be fine.

Use one of the included bands to secure the mount. Both would certainly be overkill.

The model does not require any supports or rafting; should be a very forgiving print.