Can't blend Perception Neuron + HMD data

The Perception Neuron is set up and working, the VR side is working, I just can’t figure out how to combine them. Using the head tracking from the Neuron won’t do, I want to have the Neuron control the limbs and the HMD control head position, which feeds back down the spine and has the body follow. I think this will give the best full body realism, I just don’t know how.

I think if I can drive one skeleton’s head, neck and spine with the HMD and then blend the Neuron bones in?