Rob, that is a great idea but also opens another can of worms. The subcontractor who insulated our house sealed off the attic (some kind of Tucson Electric Power 'TEP' approved home). I have concerns about this only during the monsoon season when humidity peaks and adding a Mastercool in the mix. So far the air up there does get heavy in August, it doesn't seem to get saturated. Long story short, need to research this more, Maybe give Rosie a call one of these Saturdays.
Once the woodstove gets to work, I love the idea of having things sealed for the winter.