Patterns.
- PALS: 25 mm pitch, 38 mm row spacing. 2–3 row span.
- AMPS: 30.17×38.05 mm; 4× M4 clearance.
- GoPro: 3-prong, 5.5 mm slot; 7–8 mm tab depth.
Backplate. Universal plate with captive nuts. Swap arms in seconds.
Cable. Left/right exit. Strain via TPU grommet.
Next. Drop test @ 1.5 m. Salt fog @ 24 h. Thermal cycling -10 → 40 °C.