This universal joint makes my brain feel good.http://imgur.com/gallery/5qWvrTD
Universal joint. love this. wish I'd seen it before. just made my elephant.
Universal Joint (Graphite Bushes) - STEP / IGES,STL,Autodesk Inventor - 3D CAD model - GrabCAD
Laser-cut universal joints.
How to Replace the Universal Joint on Your Car or Truck: Finished and Ready for Installation
Drive shaft removal. - photo by John Lake, 2011
How to Replace the Universal Joint on Your Car or Truck: Welcome To Universal Joint Replacement
Universal Joint - STEP / IGES, SOLIDWORKS - 3D CAD model - GrabCAD