Question Adding a second HardwareTracker

Any suggestions on how to go about adding a second (Vive) HardwareTracker to be recognised by the XR Interaction Toolkit?

The XRController script offers a dropdown list (the XRNode enum) which contains only a single option for a HardwareTracker. I've got two trackers connected to the PC and I can see them both in the XR Interaction debugger devices list. However setting the Controller Node of two XRControllers to the HardwareTracker selection will follow only one Tracker . Surely it takes a bit more work than just adding a second hardware tracker option to the XRNode list