Hi all, First post here - Thanks for taking time to read my post and offer any help. I need to change my HDD in my mid 2009 MBP 15" and am aware that Apple have used pentalobe screws to hold the hdd in place. I have a pentalobe screwdriver ordered on ebay under the listing '5-POINT STAR PENTALOBE TORX SCREWDRIVER FOR IPHONE 4 4G' having been advised by a friend that it is the driver i would need. However I have since read that the pentalobe screws used on the iphone 4 are smaller than the screws used in the Macbook Pro so... My question is this - do i need to order another screwdriver for the job or will the pentalobe screwdriver suffice? Once again many thanks and i will endeavour to contribute to this community in the future as I appreciate you taking time to read my question.