>> By my reckoning (or at least starry night pro's software) the sun on the Autumnal equinox
>> 4000 thousand years ago rose closer to south east than east but really thats just a minor point.

Just out of interest where does starry night pro say that the midwinter sun set around 5000 years ago? Was it southwest as it is today? Was Newgrange pointing at it? If not, what the feck was Newgrange pointing at?