thingiverse
Though I remodeled it from scratch, this is a remix of Wellenbrecher's design. It's designed for a VW Golf MK4, but will likely work with other VW vehicles. I made the ball mount 17 mm and created both a left and right hand version (left for right-hand drive vehicles and right for left-hand drive vehicles). I've attached the Fusion 360 file, so you can modify the ball diameter to fit whichever mount you have. I apologize if the model's a bit messy, I did the whole thing in 20 minutes.
Direct link to the original creator's page
thingiverse
thingiverse
cults3d
thingiverse
cults3d
cults3d
cults3d
cults3d
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Yes, this model is available as a free download on thingiverse. Some creators accept tips or donations.
Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.