3d printed rotational flexure bearing. This can be printed without support and allows 60 degrees of motion with PLA+, Even more with different materials. 3 versions are included, a printable one with no support, one that is more compact but requires support and a multimaterial amf if you want to print the splines in a different material than the shell. Demonstration video https://youtu.be/Vt-LFYM3QOQ