Hey Daniel,
I just made a post on the forum (Creating Manikin 'skin / flesh' (3D Brep) over 'skeleton / frame' (2D Curves, Points) ...?) regarding my intention to start a similar ‘rigging’ model of a hand.
You appear to have established great structure and principle behind your model; I’m wondering what likelihood you might be willing to share your script, or a basic methodology with me to study and apply to the hand?
Let me know your thoughts!