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Fig. 5. Testing protocol for setal arrays deformed along the natural path of drag
(`with setal curvature', in the typical orientation that geckos use them to
climb. In this protocol, the 2-axis micropositioner approached the substrate
at 45° until the array was compressed to approx. 50% of its resting
height, moved 100 µm parallel to the substrate, and then retracted at
-45°.