Hi Guys, I was hoping to run this by you all as I'm a bit baffled as to why this has happened. I recently upgraded my ram and HDD in my 2010 17" MBP and followed the simple guide on iFixit. I unscrewed the bottom case, took it off and did my thing with the ram and HDD. I then placed the bottom case back in position and re-inserted the screws. All seemed fine BUT now in the centre of the bottom case there appears to be quite gap where I am able to push it in and sort of pop it back and fourth against the components inside. The gap s probably minuscule in size but before I opened it up, it was all solid with no flex what so ever. It is extremely annoying especially when carrying it around and I am concerned it could do damage. Has anyone experienced this before or maybe understand why this has happened? Thank you for your help.