I struggled with this one a bit. We had it all cut and had to trim it down. But my editor is not very forgiving when merging, or cutting up audio tracks. The keyframing is unreliable and not really smooth, neither are the fades, if you try it it always seems like a harsh cut to me, no matter how much you try to get it just right.
I laid my audio first in one track and popped the nats where needed. Like I said before we had to cut for time, it was pretty smooth. Let me know what you think: