Hello All,
thanks so much for your excellent responses and suggestions.
I try to keep the camera as pretty clean as I can, but will be a bit more meticulous now. Also, as you've mentioned Dom and Simon about keeping the loops large, what else, in terms of loading could potentially impact on registration? As far as I know I am loading correctly and keeping the loops large enough, but I wonder whether there could be some other very minor intricacy I am failing to do correctly when loading the camera.
Thanks for the registration test run down Dom, I'm looking forward to doing this.
And will do a tripod test without the battery too - I have an external battery pack I can use - and see whether this makes an difference.
Failing all this, it'll be off to the Beaulieu doctor.
Thanks again, I'm very happy with all your really helpful comments.