Thanks all for your responses, I will work through the practical aspects over the next week.
Some initial responses. Yes, I have been in touch with Beat, had some dialog and sent him some calibration files. I am sure he is contemplating... As far as I know this is the only Disto-X in New Zealand, so a second one for comparison is unlikely until this one is working. NZ and Switzerland are on opposite sides of the world, so sending the device to Beat is almost a choice of last resort. I have tried calibrating in two areas that I presume have few magnetic influences with no discernable difference. I have yet to go far far away from civilisation, but of course will have to try this very soon. Bruce
