I've got a Verizon CDMA Nexus and had no problem at all getting the speaker bar off, didn't break the clip or anything. Just lifted up from the left side with the pry tool and it popped off easy.
Thanks for the great guide. I've dropped my phone a couple times with the USB cord plugged in and the port had gotten stretched a little bigger. I was able to get to the port and used a pair of needlenose pliers to make the port a little smaller. Now my USB cord stays in like its supposed to. Thanks so much!