Yes, it can be done...
I remember seeing the thread to which you are referring. There's no reason it wouldn't work, because all G-series machines are the same beneath their color schemes. If I recall correctly, it involved cutting a notch in the rear shell to accommodate the switch, although I don't know why they didn't just use the rear shell from the G7, and transplanting both the switch and its associated circuit board, which required a bit of wire splicing.