@ Les:

Any idea about the feetDistance and hipHeight values for the poses?  A fully-compatible Antonia set should probably have those in place.

I guess I'll use Python to compare the values in some existing poses with the geometries to which they apply so I can try to derive the correct Antonia values, if the Antonia values aren't known.

Are you using a full set of converted walk cycle poses for Antonia?  I'm using a full set and I'm not encountering anything like the knee jump.  I think that may be present if the default walk has much influence.  If you have an Antonia pose set, presumably the Antonia Walk pose should be used instead of allowing any influence by the Poser default.

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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.