im reading alot about 05-07 windows needing felt added when having the windows tinted, i am having mine tinted on friday on my 2007 GT but i have felt on mine already. did they start adding felt after a certain production month in 2007? or do i still need to have felt put on inplace of this felt? i checked it and it is in great shape. maybe the previous owner had tint at one time then removed it and put felt on i dont know??? it does have some fuzzies in it that i will clean out though..