The craft is collaborative: engineers, engineers, and makers repeat on models, refining joints, surfaces

https://www.scribd.com/document/1041332768/Customized-Copper-Cupolas-From-Specification-to-Centuries-of-Solution-171009

The craft is joint: engineers, engineers, and makers iterate on prototypes, refining joints, coatings, and tolerances until classy concepts come to be buildable metal.