Not sure where to put this, but why do some models run shorter than others? This sounds like a dumb question as I'm typing it, but bear with me. If they wanted to run the NAM 12K out to 120 or 180 I don't see why they couldn't. I know that the long range verification scores would be crap. Is it a computing allocation issue, or is that the physics aren't good enough to handle longer lead times so why bother?