If you like your bike rebuild it.Start collecting bike parts maybe another doner bike from craigs list.It will come apart with the right technique. The military taught me that no problem exists that can't be solved with the proper application of explosives.I had a seven speed hub and got rid of it the derailleur system is lighter and stronger and much cheaper to maintain for us power-houses repairs on a internal hub is a factory return in most cases and that is big bucks.