To get Bijin follower's hair physics worked,
Bijin Wives.esp
Bijin NPCs.esp
Bijin Warmaidens.esp
Bijin AIO - Hair Physics.esp
plugins must be deactivated. Only Bijin AIO.esp must be enabled.
just doing this to save my modlist! feel free to use it, it changes the combat, graphics, adds a bit of new content (mostly npcs) and weapons/armor. it took me a long time to get this to work!