Smooth contour duplication tool

Chain-like models have been proposed to approximate various contours using a sequence of connected straight segments, instead of the step-like approximation used in traditional contour gauges.The present model goes one step further by using an alignment of (roughly) circular arcs with adjustable radii, providing a smooth curve representation of a contour without any sharp points.Despite the flexibility of the thin wall that is used to implement the curved line, the whole object becomes surprisingly rigid once all segments are locked.This tool is has similarities with the Spline and whales technique, but has several differences. The constraints applied to the curves are not the same. Also, it is not used in the same way.Using the toolThe tool is made of a sequence of identical elements which can be individually locked by tightening a nut. To pick the contour of an object:Unlock all nutsPress the flexible wall side against the objectTighten all nutsFeaturesThe model is largely customizab