I recently changed my keyboard on my Macbook(plastic had a nice chip in it) and it was an easy task and to my surprise you could access just about everything with the top cover off. My Macbook runs LOUD! It definitely sounds like the fan and not the grinding of a hard drive. Also my Macbook likes to rev up and get loud and hot. I know this has to due with applications most of the time but it will even do it when I boot up and let it sit. I laso did the SMC reset to no avail. Any thoughts on changing the fan? Hoping to get rid of that loud sound. I sit next to a friend who has a macbook pro mine sounds like a jet next to it. Thanks for suggestions!