A constraint system rather than a project: treat the CAD environment as a curated barn of raw materials, then refuse to design outside it.

By restricting the palette to standard semi-finished goods (Halbzeuge) that feed cleanly into DACH algorithmic quoting portals and NRW-regional suppliers, the framework removes decision fatigue and strips out over-engineering. Every other hardware project here inherits its material vocabulary from this file — the 1.5 mm aluminium, the 18 mm BB/BB birch, the two-gauge rule.

Elegance is what is left after the palette has been made ruthlessly small.