I've just finished up opening my Macbook Pro for the first time ever to do a couple of the most popular upgrades, maxing out my RAM and installing a lovely M4 SSD. All went well apart from one issue I found on screwing the bottom back on. The middle screw on the USB/Ethernet/etc side wouldn't screw fully into place. There's miniscule bit of give on that side of the bottom when all the other screws are snugly in their sockets. It hardly even matters in practical terms; the bottom is fully secure and the screw isn't sticking out over the inlayed area of the bottom plate so there's no pressure on it or the socket when the Macbook is upright. But the internet is the land of perfectionists and none more-so than Mac users so here I am! Now I've looked up a few threads here and elsewhere before posting this and I've come across a few possibilities; the locktite used to help the screws hold caking a little in the threads and preventing me from fully screwing the head down, the thread becoming worn. As I said this was the first time I ever removed the bottom and I was as careful removing the screws as humanly possible. Any opinions would help, would a slightly smaller screw be an options (how would I go about finding such a thing?) and particularly if Apple would be able to repair it were I to go down that path and what, if any, costs that would involve. As I've no Apple Store nearby it would have to be via courier. Anyways, this whole situation motivated me to finally join Mac Rumors after spending years gleefully lurking so at least something good's come from it!