I especially liked his calculation on how many intstruments he can repair during his lifetime. His conclusion isn't existential panic, or a plan to 'scale', but seemingly, that he needs to make them count.
I can see why he has a waiting list.
https://jsengineering.net/saxes-with-linear-fingering-system...
He got saxophones in from around the world, and did a full restoration on a full set of original horns made by Adolphe Sax.
https://www.barnardrepair.com/projects#/the-adolphe-sax-fami...
Had they been made with modern adhesives, the Stradivarius violins would have been firewood in a generation.