An old falconer in my area (who is now deceased) showed me how to put together that type of system over 30 years ago. He claimed to have invented it. It's all I've ever used. Never had the system fail completely. As has been previously mentioned though, it is the falconer's job to inspect and test equipment before failure. I've always purchased the componets separately and put together my own but by the time you purchase the mechanical parts and factor in some labor, I would say this product is reasonably priced.