What are you guys using (if anything) to prevent keyboard from coming into contact with screen and creating pressure point scuffs on display? On my old 17" mac pro, I bought a thin cloth that was designed to place between keyboard and screen. But on these newer unibody designs, there's no clearance. Right now, I'm just using the paper that came with the unit. I don't carry the laptop in a cramped backpack, only a sleeve --- so many pressure points/scuffs on display aren't a concern?