[brazen1]

Happy holidays to you also.  I really don't know what to suggest about your AVR MIA in madVR settings?  I assume your AVR is set to 'pass through'?  The .bats are only for 3D users.  The playercorefactory.xml is only for calling MPC-BE from Kodi automatically further refined for assigning custom file types to it including HDR.  You should be able to test faster just playing your title from Explorer.  Nvidia has always worked for HDR and every other file type.  You just need to use a working driver while NVidia gets in unison with MS.  Newer drivers have been problematic in some aspects while others are being cured.  Add to that the changes MS is making and it's hard for everyone to coordinate in sync.  For now, driver version 385.69 has been working.  Some cards are so new, that driver is not offered like the 1030 if I'm not mistaken.  AIUI, driver version 39xxx will be released soon once again syncing with MS and improving HDR playback, efficiency, and automation.  For now, use 385.69 if possible, make the necessary adjustments in madVR (even though your AVR is MIA) and set the GPU settings like this:

Select YCbCr422 and save.
Select 12bpc.
Select RGB.
Select FULL
Save.

It will not show 12bit after saving and will be blank.  This is normal.  Don't change anything.
Aside from your AVR not showing, the only thing I'm leery of is your PJ when you say it isn't real UHD, usually 1080p, but HDR capable.  Maybe consult other owners and confirm if they can render UHD HDR titles or not.