Hi, I also have a series M Auto along with the encore software and Activa mask which I love. I have been looking at my data for about 6 months and have ended up with a pressure setting of 9 to 11 which works great for me.. My C flex setting is 3. I use the encore pro analyzer program which I find is...

Has anyone tried this mask?? Quite interesting..Sleep Weaver™ CPAP Mask 100% Cloth!
No Silicone, No Plastic!