I will be using the overhead cable runs , as i feel they give more freedom for the dog , and as long as its done well using good QUALITY cable and chains /pulley and swivels etc , and you keep an eye on the setup there should be no problems .
The thing i dont like about chain and axle setups is that the dog is not moving as naturally on it compared to a cable and also many people still think they need a chain and swivel /hardware to keep an elephant when they use a chain setup which is way to big and heavy, and the dog is dragging around to much weight .The dog should feel as free as possible and also the chain can cause more injurys as the dog will hit the end of the chain and of course their is no give and they jar there neck everytime , unlike a cable which is more firendly to the dog and the chain used on a cable setup is just a good QUALITY lightweight chain which allows the dog to feel freedom of movement.It would be nice to see sme fotos of yards with cable setups ,and how they have put theirs toggether .