I have a different device, an AG241 (combined ADSL modem, wired router and switch), which is also very moddable, but there isn't a lot of specific info out there for it yet. Fortunately I managed to adapt your process to work with this device! One difference I would warn people about - they've added a couple of screws attaching the board to the feet. If you don't realize that and apply enough force, this happens:
Apart from that it's back in perfect shape
Thanks again!


