Wi-Fi antenna was damaged when ipod was dropped. The screen shattered overtop of the antenna and cut it. I did not notice it was damaged when I changed out the broken screen.
The repair was not that difficult,after you get the screen to come loose from the glue. The guide provided on your site was very helpful.
The only thing I would add to your guide is to remove the screw from the circuit board in between the front and rear facing camera. It will give you a little more room to detach and reattach wi-fi antenna.