I have a Giant OCR composite where the rear brake cable is internally routed. The ferrule on the cable housing going from tube to brake has gone inside the top tube and now the housing is sliding into the tube also. I guess the ferrule stop has broken. I don't want to pull cable and not be able to get the ferrule out, I'm afraid I won't be able to run another cable. So how do I get the ferrule out? How do I fix the frame to keep a new ferrule from going inside the tube? Any help will be greatly appreciated. Thanks!