 If a composer asked his contractor to see who played bella laica or bouzouki, they will look into the union book and see many unknown Greek and Russian names, and then they come across Tedesco. Now, my father did play all those instruments. The difference was he tuned every one of them like a guitar. If you played more than one guitar on a session, you were paid more. It was called doubling. The first guitar was 100%, the second 50%, and the others were 25% of the session rate.