I received my i7 MBP on the 11th of may. I doesn't have any dead pixels and none noticeably yellow tint. But right now i noticed that it is not completly even on the bottom, meaning that it is kinda tilting when i'm pounding a bit on the right lower side. Should i return it or just keep it? Afraid if i returned it i would get a new one with dead pixels or any other flaws.