The craft is collaborative: engineers, designers, and producers repeat on prototypes, refining joints, finishes

https://codynucp768.theglensecret.com/why-the-hardest-architects-specify-copper-custom-components-that-prove-themselves-over-100-years

The craft is collaborative: engineers, engineers, and fabricators iterate on models, refining joints, surfaces, and tolerances until sophisticated ideas end up being buildable steel.