Dental/Positioning device is way to go. No distilled water requirement, very compact (fits in pocket), and, as of now, NO recording available which negates annual consult/report from DR. These have been just as effective as CPAP for Mild OSA and are much less cumbersome as well as covered by most insurance companies. Once your device has been properly adjusted, one sleep study proving effective controlling of OSA should suffice for FAA...
Airway Labs - Fabricator of The TAP(R)
https://www.dynaflex.com/dental-slee...evices/dorsal/