Some early pictures.

Loading a Debo. R16 with a 20 kg weight. A wide angle lens was used with the camera - that's the reason for the tilted lines.

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Measuring the flex at the tip (minus 2 cm).

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A couple of fins with the quarter point marks.

The straight lines on the strips of tape connects the thickest profile points at the base and at the tip (minus 2 cm).