Wow, looks like I got really lucky!! Saturday night, I thought it going to work alright, but it gave the error 18 after about 45 minutes. Last night, not a single error. All the menus and output (results) look perfect. 7 hrs 48 mins, AHI 1.6 / AI 0.1 Now I just need to figure out how to post a photo...

I also use the Quattro FX, and with great success.
Mine is medium.
Without the machine, my mouth opens. Luckily, with the Quattro FX, it seems to stay closed.

Good luck!
John