Hi, I plan to buy AppleCare soon and have a few questions before I take the plunge. Where are the water sensors on this laptop? Its a unibody 17" MacBook Pro. I have never really gotten it wet but have seen (and experienced) iPhone water sensors horror storiesI am willing to take it apart (to an extent) I dropped my laptop (in a soft case) from about 18" and no physical damage was caused. Anything else I need to know before purchasing.