Quote - Now this is interesting. For the right foot the translations also seem the match between files. But in both files, all the translations are zero until frame k 15.

This does not happen in the left foot, in the left foot all translations have none zero values. This does not tell us anything specific about flip3, but it probably explains why I am seeing the right toe going under the ground, but not the left. If I am right, it's an important discovery.

That is interesting, and it sounds important!  If the WD is operating as though IK were on, foot translations could make a great deal of difference.

Quote - I don't think the rotation order makes any diffrence in a pose file, I think the figure applies them in the order they are in in the cr2, irrispective of the pose.

I'm not sure.    When I was trying to write a Poser pose exporter for Blender, the results differed when I switched the rotation orders.  But that could have had less to do with anything on the Poser end than on the Blender end, where the euler ordering may have been different with the changed order.  Hmm.

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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.