> Yeah, I always think of the Carlin Stone too

that does actually look as though it could be standing. another that's just come to mind is Clach Ossian http://www.themodernantiquarian.com/site/3800 which is an erratic but it was definitely significant "prehistorically" as it was used as a (possibly the largest ever!) cist cover and stands at the centre of a henge

> I'll be in touch about the Perthshire leg at some stage!

aye, nae bother, I've a fair idea where we'll be going anyway :)

Cheers
Andy