LOL...so you're one of those people who knowledgably spews out statistics pulled out of nowhere, with such confidence that people believe you!!

Nevertheless, the basic concept remains the same...

This is starting to sound like another physics problem to ponder over the course of 20 pages, like the plane vs conveyor belt thread! Let's see, PV = nRT.....

I think I'll try Spirit's, self-inflate, blow, rest, last-minute blow again method. And for sleeping on snow, the addition of a blue foamie. Like the velcro idea too.