RAW – Large Prints:
It seems like you have all the bases covered, but there is one to be rechecked.
Let's suppose that you changed the Spooler setting from EMF to RAW.
All set.
Now you do RECALL "P" and decide to load a presaved printer setup.
If that setup was saved with that spooler setting in EMF mode, it will reset your RAW back to EMF for that print.
So use your preset printer setup, and before you print, open EDIT Preferences, Printing Options, and set to RAW.
Then resave the printer setup with the RAW in place.
I know it's grasping at straws, but you never know until you try.
Fred