Pull the Geometries .obj that you've constructed into Poser. Is the problem reflected in the .obj? Did you change the hands in the .obj, yet retain the old joint parameter settings in the .cr2? I've gotten some odd effects with Mason's technique, but they have been mainly related to IK chains, which wouldn't explain the fingers.

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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.