Up here in Aberdeenshire Chris reckons that Broomend of Crichie is the centre of a wheel with various sites making up the lines to the middle. This pattern is similar to Pitglassie, which has at least 17 sites surrounding it. When visiting Cairndale, near Maud, it was difficult not to think about the proximity of Aikey Brae, Louden Wood, Auchmachar etc. So I reckon your definitely onto something.