TLDR: Amara headgear (<$15 on amazon) fits GREAT for smaller heads for the F30 full face mask I have been using the F30 but have been struggling with the headgear. It's usually ok if I sleep on my left side, only sometimes slips. But on my back, right, or sitting it will slide down from my nose and ...

"instead of chinstrap and taping, i use a firm foam cervical collar and scuncis."

These are great suggestions! I will definitely try them out

I am wondering if any mouth breathers (due more to restrictions than just OSA dx; i.e. allergies, narrow sinuses, etc.) have had success in transitioning to nasal breathing at night. More over, have you been able to stop using chin straps/ mouth strips with the nasal pillows after you have adjusted ...