Gave up on that multiple animated joint centers to inject experiment. Works well in scene, just isn't copying to a perfectly working injection. Seemed to be compounding the morph portion during bends. Fact is you can pose La Femme's tongue in the same way using just the translate, bend and scale dials built in (probably due to the new smooth translations feature) so in reality... a redundant experiment. I did learn how to use the animated centers feature pretty well though, which should copy to inject ok if just one joint (fine tuning an eye's match centers for instance), so not a complete loss.