I am trying to improve my Source 2 Hatsune Miku port also I am gona update her rig too to make it more perfect animation this is before rig update. Also now I am working with 3 diffrent version at same time of Source 2 ( Half-life Alyx + Counter Strike 2 + S&box (closed beta) )
I am working on this for 2 months before I make it more perfect heres my past tests:

#S2FM #SFM Source 2 Filmmaker Hair Cloth Jiggle Collsion Sakura MikuTest
https://youtu.be/8D8Jusu8Rdk

Source 2 What if Sakura Miku Hair got Has Base
https://youtu.be/GQHMqkAH4Kw

Sakura Miku Jiggle bone. Implemented through cloth collision test HLA SFM/Modeldoc Source 2 test ( this one kinect 360 only 2 used )
https://youtu.be/uh2WDg9Iyxc