About this 3D model
I created this for use in different rental cars, as nearly all cars should have a sun visor. The 17mm ball is standard in many smartphone holders and other accessories. For example I'm using it with this Magsafe Charger (affiliate link). For the extension arms go here or use my print profile, which includes some arms: modular-mounting-system-gopro-arms-customizable I used a 30 and 90mm arm. You will need one M5 screw and nut for every joint. ( amazon affiliate link) The first picture shows a slightly different prototype version. Consider printing in ABS or PETG, as PLA maybe wont survive a hot summer day. If the ball doesn't grip hard enough, use the second build plate, which contains fuzzy skin for the ball-part.