Update: I've ordered a ComfortLite 2 so I can start a rotation among two masks.
In the meantime, I noticed my sore nares is caused, in part, by a slight cut on the inside edge of my left nostril. I've been putting healing cream on it over the past few days, coupled with vasaline on the nares prior to putting on the Swift. Also, I made a renewed effort to ensure the mask straps are located and tightened properly. I noticed, for instance, that the buckle on the upper part of my head had shifted to the left side (i.e., I had been pulling the strap tighter on the left). My mask is now more "balanced." The sore nares is not gone by any means, but continued further adjustments appear to be making it tolerable.
Thanks for all your help!!