I felt my old knobs for my RC controller was small and with bad grip so I made some new ones that utilized a thumb grip instead.
Just glue the top and bottom part against each other with super glue.
The hole for the knob is 3mm and 10mm long. Then there is 3mm deep at the entrance that is 4mm wide in order to slide over the non-threded rod.
The structure can most likelly be drilled to fit larger rods.
Direct link to the original creator's page
thingiverse
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.