Dear Maestro, I wanted to tell you that Professor Fabbris had already put the Faster on my “Augusto Pollastri” from 1925 with excellent results!
Then after I had my Cremona luthier do the work of closing and reopening the button hole (because it was too big), he finally inserted the Faster into my second instrument as well (a 1917 “Serafino Casini” published in the book “La Grande Liuteria Italiana” by A.Versari), obtaining a much more homogeneous and powerful sound for this instrument too!
Thank you again for your wonderful invention and for your great work.