I've seen some people talking about running a MB with the lid closed and an external display. Some people said that it could warp the screen, but I've also seen people saying that it's fine. But this was all a bit of time ago. Has a general conclusion been reached? I'm going to be placing my MB on an elevated shelf with a wire mesh bottom, so there should be good airflow and if need be I can aim a fan at it to cool it off. Would this be totally safe? If there's a chance that my screen will be damaged, I will run it with the lid open. Also, do I need the SleepLess download? Will downloading it void the warrenty? Thanks!