Question, if you lock the mouse in forward view, then change view with trackir. Does the mouse move?
Or does it stay locked in the center of the forward screen?
It stays locked in the center of the screen.
Example:
Mouse pointer locked in center of screen, on gunsight

Now I moved my head a little bit. Mouse pointer is still in the physical center of my screen (it may not look like it here, but I cropped the picture), but not aligned with the gunsight anymore.

Edit: The two original pictures, resized:

