Hi there Greg.
I think it is better not having any external object with kinect, if i understand correctly for this purpose you would use the normal webcam of the kinect, aren´t you? If this is true we are gonna loose the depth propierties of the kinect, and i think is quite usable this depth camera.
Yesterday i was trying things and i did a configuration that looks pretty promising, but i need more test in it. The string si the following:
Opentrackkinect -> Opentrack -> Freepie -> Driver4vr —–>>>>> SteamVr
Doing this configuration you can benefeit of the Accela Filter in opentrack so the tracking is really smooth and you can scale it. Just tested it yesterday but looked promising.
I will update this post tomorro with more testing.
Thank you for all Greg!!