Many musicians and makers of musical instruments are secretive, jealous, downright hostile at times. Martin is proud of his mentor. I said anytime anybody wants to know something about making accordions, you help him all you can. There'd be no libraries, no books, no songs. We'd be lost in the dark ages.
Sharing is the only way.
Teach the other person. Don't guard the secret. One secret that Savoy did not hold was how he managed the brilliant colors on the panels of his accordions. The brilliant greens, blues, even purples are simply lacquered food coloring. This is a family operation.