As a happy update...
The EPR on ResMed wasn't very comfortable for me. I thought back to my most recent sleep study (titration) where I had taken sleeping medicine and used the same mask I do at home (Resmed F10) but the machine provided by the sleep center was a Phillips.
I decided to take a chance and get the new Dreamstation and using the A-Flex which I found much more comfortable. After a Belsomra I tried the new machine last night...
5.6 hours with only taking the mask off once but I woke up to put it back on within an hour, and it was most likely due to some pretty intense nasal allergies I had during the day.
AHI of 3.2
It's a start and I wanted to thank all of you for the advice. I'll stick with it now.