Kim, Italian 're-pops' are just that; modern reproductions of historical (and valuable) mementos of the past. That being said, there are some rare or old reproductions (e.g. the Gregorelli and Uberti ("GU") repros, and some of the ones that are no longer in production. Those I wouldn't mess with. With respect to 'garden variety' Piettas, etc...totally up to you. They are neither rare nor valuable and altering one to suit your needs is not sacrilege.