I'm not sure if this has been covered. I'm new to both R-tuber and the tracker! I wanted the U/V (Roll) controls to work when I rolled my head
and added a neck joint so that I didn't have to link the head tilt to the X/Y controls!
It Motion Inherets off of the Body (so it follows the body XY), and is pitted at the top of the model's neck/base of skull. I have the Head motion inherent set to the N_joint (Duplicate Necklace below), so the N_joint makes the head roll, and the head can then do a separate XY.
I dont know if this will be of any help, and it could probably be done easily for others (and maybe is already stated above, but I wasn't able to use it with the settings I saw above, as I wanted). I'm hoping that if this is something others were looking to set up this way, I hope it will be of some help!! -Roslind