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 Ducati Meccanica
    Posts: 2,467
 Join Date: Dec 2001
 Location: North Yorkshire
 Mood: Is 112 dB loud enough?? What??
  
    
     If the bobbins are still round, i.e. not deformed, then I would think that only leaves the carriers. Any "wear" either in the bobbin or the carrier is deformation of the metal.