There's quite a few much smaller in the area ,none excavated iirc. The big one looks likei thas been robbed .
Yes Schiehallion to the west , not it's most impressive view .
I haven't found anything on the hill above the Braes of Foss recorded example . One on the same contour to the north last year and a few others near Tempar and others in Glen Goulandie .
RA tends not to get found on steep slopes (usually closer to settlement )and if there is a lot of rock ,as in this case , it is a huge amount of work .The most likely areas around the hill are the glen of the Allt Mor but nothing as yet .
450 m seems to be about the limit apart from the Ben lawers examples