Apple quietly publishes vector drawings of ninety of its products for case makers — iPhone 12 through 17 Air, Watch SE through Ultra 3, AirPods, AirTag, even the Zeiss inserts for Vision Pro — dimensioned in millimetres to the hundredth. Dr. Drang, forty years into reading engineering drawings, is better on what is missing: no revision history, no draftsman, no checker, and no tolerances anywhere, because “Apple’s dimensions are absolute and invariable.”