Here's something that might fix the pilot centering problem. I've used the following to fine tune the default pilot position when using either TIR or VR. Regardless to what was mentioned above, there are user editable configuration files for all aircraft in MSFS. I've changed both stock and marketplace aircraft files using this technique. An aircraft's default pilot head position can be changed by editing the appropriate entry in its cameras.cfg file. An example of where to find a specific aircraft's cameras.cfg file:
(your install's location)\Official\OneStore\carenado-aircraft-c337-skymaster\SimObjects\Airplanes\Carenado_C337_Skymaster\cameras.cfg
To change the default pilot position, under the file's [CAMERADEFINITION] section that is titled 'Title="Pilot"' edit this entry:
InitialXyz = -0.3, 0.62, 0.25
the first value (x) is side to side, the second (y) up and down, the last (z) is front to back. Units are approximately meters, larger values move right, up, closer to instrument panel. I comment out the original line by putting a ; before it before editing a copy of the original line. Here's an example:
;InitialXyz = -0.3, 0.62, 0.25
InitialXyz = -0.3, 0.62, 0.4
As usual, it's best to save a backup copy of the file before making any changes. Also, for VR there is a PilotVR section in this file that only effects the pilot position for VR. There is no need to change the PilotVR section unless you're using VR. What is nice is that changing this file is a one time only operation, though downloaded updates to the aircraft many revert the file to its original contents. Hope this solves the issues your having.