I have a 15" MacBook Pro 5,1 2.53GHz Intel Core 2 Duo I believe this model would be called "unibody", but I have the early version with a removable battery. Can I fit a 12.5mm drive in there? I'm reading conflicting information in the forums. I'm look at this drive. http://www.wdc.com/en/products/products.asp?driveid=685 I'm assuming this is compatible with my laptop correct?