Here's the same animation after an added process to restrict the distances between marker points, to prevent the rubbery stretching seen in the previous post.

Now it needs to prevent the overshoot at the end of the chain.  Due to the rounding of the link count when extending the chain to fit the path, the current process can easily result in a chain which over- or undershoots the last marker point by one link.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.