Andy - my apologies.
Your item looked like you were claiming to be conducting the experiment. I thought you might have been one of John Hill's students from his latest course on Stonehenge at the University of Liverpool.
It was not clear that you were passing on information which you had found elesewhere - in this case, perhaps in 'Northern Earth'?
Keep up the good work, and thanks for drawing this experiment to peoples' attention.
Best Regards,
Brian Coggins
Something is not right. This message is just to keep things from messing up down the road