Yes Greg so far Opentrack etc has only worked with HMD as “extended monitor” whereas I’ve been looking for a Direct SteamVR mode solution which you can provide by the looks of it.
I personally don’t have a Kinect but do have a trackIR5 as well as a PSEye camera DIY IR setup using three IR Leds.
I know there is a group of people looking to get simple 6DOF head tracking for seated games. I would greatly prefer to use the IR tracking for all axis vs a blended IR positional and gyro rotational as PImax has very bad drift.
I hope I am being clear I can try to explain better if needed.