Don't remove the antenna tape or the wires from the tape! The antennae can come off with the large metal shield plate anyways, so why remove them separately?? Extra UNNECESSARY WORK!! Just unscrew the antennae modules themselves, and pop out the antenna wires from the mainboard. Then they will lift with the large metal plate. (Steps 10, 11, 15, 16 are unnecessary, just remove the screws only that hold them down)

The Nexus 5X battery is 2700 mA, which is 500 more than the nexus 5's 2300 mA battery. I don't think the batteries are interchangeable.