Hokay, so this is more of a prototype - I wasn't quite satisfied with it, but maybe someone else can do it justice. The idea is a hex shaped dogbone, with cups that are designed to take a DuBro 1/8" collar internally. I think I forgot to put a hole in the side for the set screw, but I think you can get the idea. Like I said, this is more of a prototype, so if someone wants to take it and run with it - go for it!
3D Printable DogBone/Drive Coupling 2022-04-20
Drive Coupling Prototype
