Visited 03.07.11
After a grid search of the hillside around NB 177 345 I found a viable candidate for Callanish XV at NB 17753 34588. The recumbent stone was c. 7 feet NE-SW and 4 feet SE-NW. This site is actually Callanish XV. See Canmore ID 72849 for further details (go to Links).