I bought an invisible shield for the "old" 15" 2.16 macbook pro, but I am returning my computer for the new model. I obviously have not applied the skin to the computer. Everything is still in its packaging. Does the invisible shield (bestskinsever) for the old mbp fit the new mbp? I suppose my question is if there is anything different about the external physical dimensions of the computer? port placement, hinges, buttons, screws, etc.