It has been my experience that a six figure OS Grid Reference is inadequate for locating Cup & Ring Marked stones: It defines a square measuring 100m by 100m. It can be frustrating to find one stone amongst many. Canmore ID 62758 gives a ten figure OS Grid Reference, NX 37193 41422 for Blairbuy 1 Carved Panel. This locates the site to a 1m by 1m square. In my opinion, all Cup & Ring Marked stones should have ten figure OS Grid References.
I've updated the grid ref for this. 👍
Thanks for editing the file. Mark