I went ahead and updated to zv5 in anticipation of Chevs new rom. I'd like to get back to zv4 since the only thing i can tell this update did was to break tethering capabilities. Can someone guide me to the safest way to do this? I found restore stock.zip in the ota thread but the next post mentioned about the time stamp and bootlooping etc. Is there a cwm flashable stock zv4 backup available?