Hey Paul,
Your rig wasn’t coming threw on the file you attached. I was able to test it on a few of my own rigs and got it to work fine. This is what I did:
- In object mode create a Camera and Create Armature>Single Bone
- Select the camera, shift click the bone.
- CTRL+P > Object
- Now Select the Cameras bone, shift click the head bone or head control while in pose mode
- CTRL+P>Object
You should have a fun new face camera at this point. I can’t share any of my rigs but I simplified it and attached the Blend file.
https://drive.google.com/file/d/1oX6UBrm_s7ed_ofOZSRMOLdxZvaUvFTu/view?usp=sharing