I can't remember what the feature was called, or how to set it up, but Poser 7 introduced a new infrastructure for linking parameters in a way that would allow full animations to be controlled by a single dial.  I think the P7 native figures have some examples embedded in them, and Ockham released a script, IIRC, which can set them up.

But use of that would break backwards compatibility for Poser 6 and earlier versions.  Which is I suppose why no one seems to use the feature....

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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.