Summary

Got tired of my carriage harness wires breaking inside the insulation because Anycubic's stock Chiron cable chain on my machine made it flex too much. Had the cable fail at least 3 times because of it.

STLs can be edited @TinkerCAD: https://www.tinkercad.com/things/1zjJElOGMlH-anycubic-chiron-pneumatic-tubing-for-printhead-harness. (The control anchor point has the little disk under it is for adhesion - easier than fighting with cura to get the small contact areas to remain stuck down. Printed it once and never had to go back, so it remains as it is.)

It's not pretty or polished but it works. The cable does not flex very much at any point. Zip ties hold it in place. Pneumatic tubing (https://www.amazon.com/gp/product/B07QPRJ113/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=goliyowo-20&linkId=fe4af24d21131d056b3f2bd0b1794639&language=en_US) is a friction fit in the mounts. I had put the holes in so I could pin the tubing in place but it doesn't seem to need it.

Since the tubing was fairly tightly curled from being coiled up for a long time, I put the tubing in boiling water for a while. Then I let about a 6-7 foot section hang with the rest of the coil as a weight to hold it straight, letting it cool that way. Took the curl mostly out.