Added a bit of volume, to float the camera and the extended battery. Its still really only like 6 to 7 inches long. Print with 10% fill for structure strength.

I also strengthened up the structure of the mount. Printing upright was making a nice print, but the mount would crack off with any pressure. So I reinforced the mount its self. Takes away a little of the tilt range, but its way stronger.

Print at 101% if you are having problems fitting the nut in the hole for the mount screw. The design can support a % or 2 and still mount nicely.