Has anyone seen any guidance or documentation on how to use a custom mesh with handtracking?

Hey All, 

(sorry for the cross post with unity development, just realized that this might be more appropriate here)

I've been playing around with hand tracking, along with arm and body presence using IK.  I'm hoping there's someone out there who has some seen some information or documentation on how to go about swapping out the Oculus provided Hands used in hand tracking with your own model.

So far I've got the following https://www.youtube.com/watch?v=__bBJpAmNfY ;which, in terms of the arms and body are "OK" but the next step there is to get each of the underlying model's fingers to move and animate with the OVRHandPrefab 

Anyone have some idea on where to start there?