Has anyone been able to find a good ACTUAL pentalobe driver for the bottom case screws? Most are just 5-point star drivers, which work but chew up the screw heads after a couple uses. I have iFixit's version, but that's just the 5-point star driver. Or, better yet, does anyone know the screw sizes so I could get a replacement set that is phillips or torx? I have the 2011 13", and it is creaking. Brought it in yesterday, they tightened the screws up which helped, but I have a feeling I'll be needing to tighten them every so often and I don't want to have to take it in each time it starts creaking. I want to be able to put the pentalobes back in if I have to take it in to Apple, but not have the heads look like I used a screw extractor to remove them.