I acquired a GMC 600+ some time ago. I have had some interesting results from my brothers classic watch collection and a few "interesting" results from a couple of our beaches here. I live approx 30 miles away from Sellafield.
Due to the time that I have had the unit is there anywhere that I can download and update the firmware on the unit (I haven't found anywhere on the GQ website).
If someone could point me in the right direction I'd be most grateful.