Sorry Fitz ,if it was a bit opaque . Basically using as accurate as possible grid refs for the centre of the various henges and some major stone circles (trying to keep to the same Neolithic time frame where possible but Croft Moraig which is Bronze Age fitted in so I left it ) then using as accurate as possible software which takes into consideration geodesic probs like earth curvature etc the figures generated are the bearing from one centre e.g. Knowlton and it's bearing to others , they are remarkly close .If the old Ley hunters had seen this they would need new breeks , and how they missed it god knows , too busy looking at churches and iron age forts etc.. So
Knowlton –Castlerigg = -10.9696
Knowlton –Cairnpapple = -10.4121
Knowlton –Strathallan = -10 .2104
Knowlton-Croft Moraig = -10.8630
means that a line between those centres varies by a max of 0.7 degrees . over 600 k or more .
Another one Callanish –Arbor Low =148.7246 , Callanish –Castlerigg =149.9665 is within a few degrees of the major lunar winter standstill .
What it means if anything I don't know . The -10 is the way the prog writes 350 degrees which may be off putting .