However, it seems some of those other Camera settings there are making it too narrow, and "over-scanned" off the monitor at the top and bottom. Is this indeed where we fix that, and are there some common fixes here to make the Playfield look more normal on a cabinet?
Personal recommendation
in the editor in the backglass view
with test desktop UNCHECKED
and FS view selected (you are using a cab yes?)
set X Y and Z scale to 1 (in fact NEVER EVER change Z Scale from 1)
now hit F6 to open table in interactive camera mode
control keys change funtion
shift keys change values
1st, control key to X and Y offsets (OFFSET not SCALE)
use these to center the table
Use Z OFFSET to zoom in or out of table
layback for cab mode, in general try using around 60
FOV around 17
now, give just enough inclination so that table has 3D depth and doesnt look absolutely flat.
recenter the X and Y offset as needed
readjust Z offset as needed
RESIST the urge to go grabbing X or Y scale to artificially stretch a table to the screen
at an X and Y scale of 1, the table will be exactly as it was designed.
When adjusting Z offset if the table hits the sides of the screen in one dimension, that is simply as big as the table goes without distorting it out of scale.
I know some people will tell you to do different, but i think you will be happier if you at least start out this way.
Stretching on X or Y scale does exactly that, and in turn stretches all the graphics
circles become ovals, balls become eggs etc.
And just FYI, stretching on the Z scale physically rips the table apart or crushes it flat, and it is a physical change, not just visual, hence NEVR EVER do it.