<Athgreany is one of the places I was thinking about going to on Sunday to check out 'the big lunar thingy'. It should be very close to being diametrically opposite the sunset on Sunday night I think.
Interesting that it's rising over Church Mountain around now. I would have thought it would have been further east. I always lose my bearings at Athgreany!>
May be there Sunday meself Tom, marmite and insect repellent in hand. :-)
I know of the moon skim at Callanish from the book but if you have time can you expand on 'the big lunar thingy'.