How to retarget MOCAP animation with an Humanoid Skel

Hi all,

With my team, we work on a project with MOCAP animations.
We have a skel with 3 spine and RollArms.

When i retarget my animation on a humanoid skel in unity i have'nt the good animation because unity humanoid skel is so basic (2 spine, no rollarms..).
The movement is misaligned.. (i think its because i have keyframe on my Spine2 and it not recognize by the basic humanoid skel of unity mecanim).

So, my question is : It is possible to upgrade the basic humanoid skel and adding my additional bones ?

I know , i can have my animation with generic mode but i want to try Humanoid for this project and use IK.

Thanks for help !

 

Yes i read this post, thx for your help !