"Just do it backwards" is NOT helpful reassembly instructions because the hinge doesn't work that way. To "do it backwards" would be somehow sucking it in via the area above the dpad which is physically impossible. In order to reinsert the hinge, you need to get all the ribbon cables threaded through and the wires on the other side, before putting the top front plate back on, then slide the hinge piece into the top inner shell from the outside until it is flush with the hole it goes into. Then line back up the bottom inner plate, and push it "out" towards the place the LEDs will be, from the gap below the top LCD. I had to look up a separate video of someone doing this, and I'm afraid that in trying to figure it out myself using this guide I might have deformed the hinge somehow because I cannot for the life of me get it to go back where it needs to go.
