I print this model as lay on to the side face. So, when you bend it, it would be more flexible and prevent cracking.

I have not too many options so, I use PLA for flexibility. If you want it to be resisting to the UV light outside and the weather, you would choose another filament for it but please lower the infill because it would be harder to flex when you switch to another filament type.

I recommend to use %15 gyroid infill. But, probably less infill would be okay.

It fits to the handlebar with 2 zip ties those are passing inside of the mount.

You can cover the inner side of the mount with double sided tapes or something that would make a cushion effect between handlebar and mount to prevent it sliding that is vibration caused or hitting a pothole. Otherwise it really slides on handlebar.

This is my first model published, so I am open for improvements.