It's been a while since I've been Drew but if it's any help ,from memory , there is a single standing stone and another pair (one small and prostrate) at Skelmuir about 200m apart . I don't know anything about stones at all at Corticram , there was a a destroyed stone circle in the area , mentioned by Coles ? BTW let me know if you want the grid refs for the rock art around Rhynie .