About this 3D model
I used this file to attach my note 4 to my existing car mount. "Full Bumpers" could be a good starting point for a custom Note 4 case. "Bumpers" reduced the amount of plastic to make it easier to get the phone in and out of the holder. "Finger Bumper" is a Full Bumper model but leaves a cutout for access to the stylus pen. As a result the bottom right bumper has slightly less of an overhang.