When reassembling, the right microphone (the one on the left in the above picture) has a metal back that has two alignment tabs. One is on the bottom left, and if you just try to push the microphone down into position it will be held up by the tab. The tab is black plastic and not real apparent unless you have some decent light on it.

Thank you! I just completed this repair in about two hours following this guide. It takes patience, but you can do it. A lighted headband magnifier is a HUGE help when I work on these kinds of things. Thanks again to ifixit for the quality parts, tools, and guides.

I received two boxes - one box contained the repair part, the other was the tool kit. I only opened the tool kit before disassembling the phone. The standoff screwdriver bit was not in there. Neither was the guitar pick. I used a real guitar pick and a small standard screwdriver from my toolbox. When I was ready to reassemble, I opened the repair part box and guess what was in there - the standoff screwdriver bit and guitar pick. So, I guess if you just order the part it will come with (at least) those two tools. The tool kit contains tweezers, suction cup, three screwdriver bits (tri-point, pentalobe, and phillips) and screwdriver handle, a long black spudger with a flat end and a pointy end, and a smaller, thicker spudger with a wide, flat ends.