Gimble with 9.5 mm ball
thingiverse
Gimble with a central cup. You add a 3/8" size bearing in the cup for a weight. Any which-way you tilt the outer ring, the weight will always point down. If the bearing is a little loose, add a bit of blu-tack or other sticky stuff to keep it in. This is a remix of http://www.thingiverse.com/thing:100362 I found the original design to be too loose (would not stay assembled at all) so this one has tweaked parameters to print well on Ultimaker 2 in PLA with 0.1 mm layer height. Specifically, d=3.1 and s=1.015 in the SCAD file, which is included here.
With this file you will be able to print Gimble with 9.5 mm ball with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Gimble with 9.5 mm ball.