There is only one way to repair a carbon dropout and that is to replace the carbon with an injection molded part. Why? Carbon bikes are made approximately in 2 ways: Lay up for the tubes and injection moldings for the high pressure sections such as the dropouts, brake mounts, some front mech hangers. If these components are repaired in any other way they will most likely fail as the first picture shows – the 3rd attempt before sending it to us.