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The beauty of this technique is that it allowed us to create a cr2 that is true to the V4 distributable cr2, but simply replaces sections with new joints and calls to original geometry that are loaded and welded by Poser on the fly.

Hmmmm, quite interesting indeed.
When Poser welds on the fly did you have to match the vertices of your tail up to the vertices of the body parts being replaced?
Hope you understand my question, let me know if you don't and I'll try another angle.
Great work by the way!

Comitted to excellence through art.