Quote - It could have been avoided very simply if the lower stomach area had been named "waist" and the pelvis area had been named "hip"

If the concern is pose compatibility between figures, wouldn't naming the actor at the top of the hierarchy "waist" create problems?  Antonia takes the poses of other figures tolerably well.  The "hip" actor is still the top actor and the poses ignore the "hip2" actor.  The "waist" sounds like a standard name for an actor which falls between the hip and the abdomen, where the hip is still at the top of the hierarchy. 

Are you suggesting that it would be better to name the top hierarchical actor "waist", rather than "hip"? 

The key point with Antonia's rigging is that the pelvis area is not the top actor in the hierarchy.

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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.