Hoping someone can advise me here. We have an Outwell Hartford XL. Last time we used it, when we took it down we found one of the sections of pole had split. There is a spare one with the tent, but I have no idea how to replace it, presumably you have to unthread them all from one end? I am worried that if I disconnect the elastic I will never get it fastened on to the end pole section properly again? Has this happened to anyone else?