Has anyone here had their topcase on a 15" unibody MBP replaced? If so, how long did it take? It looks like mine might need a topcase replacement because of a problem with the keyboard. Its not yet confirmed, but the technician at DH V-Mall agreed that my left key was difficult to press. Apparently they would still need to open it up for checks and testing and then order the part from Apple in Singapore. I was just wondering how long this entire process usually takes. Advice, anyone?