This Pi Camera mount uses the camera case from the Articulated Mount but replaces the articulating arm with a fixed arm. The links on my articulating arm used to get lose all the time, and the 3D printed bolts kept breaking; the camera was shifting position constantly.
This version of the Pi Cam mount weighs less than half of the Articulated Mount, and uses metal M3 screw and nut for position adjustment, so it can be tightened properly.
Requires one 10-12 mm M3 screw, a square M3 nut, and an M3 washer to connect the arm to the ball mount, and a 6-8 mm M3 screw to connect the arm to the motor.
I've enlarged the ball slightly because I wanted a very tight fit between the ball and the camera back. However, if you have a little overextrusion, the fit may be too tight, so I'm also including a version with a slightly smaller ball. You may want to print both an see which one works better for you.
More information and download STEP and Fusion 360 files here.
The author remixed this model.