I would try the Breeze nasal pillow system manufactured by Puritan Bennett. The system is called an ADAM Circuit and works very well at higher pressures.

I have found a link to the Clinical Setup Manual that will allow you to access all the features your S8 Elite II w/EPR has to offer. I personally tried it on my machine and it works flawlessly. Here is the link to the pdf: http://www.apneaboard.com/S8%20Compact%20Setup%20Instructions.pdf I would mak...