I have recently been playing about with alignments between major henges and stone circles and came up with some figures that look like they might not be entirely fortuitous . I ahe vnever seen the alignments mentioned before so apologies if they are old hat .Stonehenge-Mayburgh=-8.7248
Stonehenge-Balfarg = -8.3712
Castlerigg –Cairnpapple = -9.8374
Castlerigg-Strathallan = -9.5612
n.b.The grid ref for Strathallan is only 8 figures ,so greater accuracy possible with finer detail .
Callanish –Arbor Low =148.7246
Callanish –Castlerigg =149.9665
Arbor Low date 2700 BC
Major Lunar Winter standstill 2700 BC Arbor Low =149.44