Robo 3d R1 X Idler with Cable Chain mounting

5/28 - Added version of chain attachment that can be mounted to stock robo x-idler. I also made outside chain connection male so I could reduce the length a bit. It seems to work a bit better.

I wanted a better Cable management solution for my Robo 3d R1 after getting frustrated with the stock cable management. I recently changed my extruder to the E3D Titan and at that time took the opportunity to install a cable chain. While this definitely helped I wanted to expand and use a cable chain on