The cable runs up and through the inside of my z axis And every axis has cable chain. The cable comeing from the spindle does not ever move other than vibrations, the blue tube is silicone so that should take the point load of the joint and dampen vibrations. I would have thought if I were to get a failure now it would be in the cable in the chain that is constantly moving,how long are cables expected to last? I agree if the wire was just going straight up to were ever and no chain it would need more but I'm not sure why anyone would do that.