I really am interested in protecting my 13 inch Macbook Pro with the Speck SeeThru case, but i have some concerns. Maybe some of you who have owned or own this case can answer my questions... 1- Does the case scratch the macbook when it is applied, and removed? 2- Does the added weight from the case have any negative effect on the screens hinges. Does it 'loosen' the screen over time? 3- Does the case cause any over heating issues with the macbook pro?