The plastic parts for all the coils are the same for all notes.
Print it upside down, that is with the coil on the bottom and the rebound arrester sticking up.
Do not add any supports.
Print with 20% infill.
Carefully inspect the 3d printed plastic part, and remove any artefacts of the 3d printing process using a knife or a file. Pay particular attention to U shaped slots where the hammer will hang and to the faces where the coil will be wound.