So I did the guide again, step for step, but I kept the laptop completely off the network for the entire process and everything turned out okay. I have an AirPlay receiver on the network that kept ending up being the only device I would have. I think my desktop build has been struggling with audio for the same reason, which is kind of strange. It may just be coincidence.
It looks like I'm caught up on that aspect. I get static on headphones (which is the current state of the driver, i think). I have not tested with my docking station yet.
@pokenguyennHere is a link to my Dropbox for the E7440 config files.
@Jake Lo Yes, I installed in /S/L/E.
Recap:
Wifi + BT from AW-CE123H
Used below instead of latest HVT (1.7.3)
BT worked after installing kext from this thread.
5 GHz was patched via the script in this thread (updated version).