How loose is normal for Macbook Pro 17" hinge ....i have a speck case on it...so i feel like the extra weight isn't helping the matter...but there is definite resistance with one finger...but if i move the laptop around the screen either closes all the way or opens all the way...now i took the case off the top and it improves the problem...but do you think that it will get worse in time? i did go to the mac store and the displays were almost identical, whats your thoughts....thanks in advance....