Yeah, I thought about switching nostrils mid-process, but I managed to convince myself that that might impact the primary mission of draining the sinus cavity. Definitely worth considering if you are the sort of person who gets ear infections at the drop of a hat (like my brother).

This would seem to be the study you mention. I took away the same message as you, that that your sinuses should be left alone when they are doing their ordinary job but when they start forming enough mucus that the drainage affects your respiratory system then irrigation is a sensible therapy.