Well, the Air has been taunting me for weeks to see its innards first hand. I assumed I'd wait until a drive upgrade or needed to replace the battery for first surgery. I didn't really want to do it since it was near flawless until three days ago. Well, my Air developed a bit of a wobble on its feet and when I tapped on right front next to trackpad there was a bit of give/tap sound as right-front top kinda' hit something. I assumed it was from traveling in briefcase and I torqued it wrong. Tried tightening outer screws to no avail. Finally took bottom off. Very easy. Turns out inner screws were just a tad loose on battery to case mounts. Got 1/2 a turn out of a lot of them. Put it back together and no wobble and top is now as secure as it was before. Also got some dog hair out of wee fan and vents. I assume the screws just loosened a bit with heat and use. It also sat for a day in below freezing car. It is pretty inside.. Imagine all the good Airs that'll be in refurb. store for want of tightening some screws.