That looks thoroughly cool, Cian.
Do you know any more about the 'history'? The article you linked to
http://www.carrowkeel.com/sites/croaghpatrick/reek3.html
suggests Gerry Bracken spotted it. but he calls it 'St Patrick's Chair' - which could be a nice indication that people in the past knew about it. Perhaps. I mean most rock art doesn't get a name does it? ( the Patrick's Chair most people know about it is some rocks up the mountain, one of the stops on the pilgrimage.)