Question About Valve index knuckles control finger tracking Animation

I'm doing a full body tracking with 8 tracker, but I can't done the finger tracking that with Valve index controler
But i need the hand "stick on my avatar arm" / or you can say my avatar support hand tracking

I used SteamVR object to track the vive tracker, Finalik used VRIK< to give some rig/ik



(have some unity package "SteamVR" input ) Skeleton Input https://valvesoftware.github.io/steamvr_unity_plugin/articles/Skeleton-Input.html
Make a perfeb hand is easy,and already support the Animation from STEAMVR input
It can generate a pair of hands in the air
i found out SteamVR_Skeleton_Behavio_Custom can root from the "Wrist" part



so i put those to the avatar (wrist,5 fingers, 3 joint) << run with unity humanoid rig

and.. the avatar mesh just go crazy and not working




I found a successful case Some reference here
https://forum.unity.com/threads/oculus-handtracking-with-custom-hand-model.810678/
But it support for oculus XR plugging

Anyone can help me out?