P95/P25: compare free in-plane movementP95/P25: compare free in-plane movement100 mm span · ΔT = 100°CX: 13 ppm/°C → 130 µmY: 14 ppm/°C→ 140 µmMount example:17 ppm/°C → 170 µmEngineering illustration · Not measured production evidence · Not to scale