In 30 years, I have made many ocarinas, but none of them were the same because they were all created at different moments of my life and in each I put my feelings, my emotions and my dreams. That is why every single ocarina came out as unique and unrepeatable.
Craft professions are wonderful but also quite innate. In my opinion, being much patient and curious, respectful with other jobs and in constant learning for a long time. Knowning a piece of history, analysis of historic instruments, musical knowledge and adaptation to new technologies. But overall, a taste for doing a good job.