Judy suggested I post some CPAP mask fitting guidelines, and then have the pros here revise and modify as necessary. What follows is a draft procedure for fitting a nasal mask or full face mask. If you have any ideas as to how to improve/revise, please let us know. We will then repost a Final Version.

CPAP Mask Fitting Guidelines -- DRAFT VERSION
"With a proper mask fitting you would lay down and just lay the mask on your face, turn the CPAP on at your set pressure or 10 cms whichever is higher and then adjust the straps JUST ENOUGH to keep the mask from falling off your face. The adjustments have to be made evenly, same lenghth and "tightness" each side. BUT - NOT too tight! The biggest mistake newbies make it so keep tightening the straps to reduce or eliminate leaks. It is also the biggest mistake the "professionals" make when fitting our masks for us! The mask cushion MUST be fully filled w/air in order to form a good seal. IF we tighten too tight we "squish" a good amount of the air out of it. Often we, or they, are snugging up the mask too tight when if we just ran our finger along the "seam linel" between mask cushion and skin we would be turning the edge of the cushion UNDER just enough to finish the seal and reduce or eliminate that leak."