"Although hole stones are not generally associated with stone circles they have been shown to form part of these monuments in Scotland."

Any idea which Scottish circles they are refering to?

I'm waiting for a reply back from the Corwall Archaeo Society but I've not read anywhere yet that it has a projecting base to it so it could be secured like a normal standing stone. I think it's an important point in attempting to understand the make-up of the settings.
IF, like they seem to believe today, that it was part of the setting of an actual circle of stones, then one would expect it to be earthfast like the remaining stones, but if not, then why not? That would 'suggest' that it was possibly meant to be moved around the settings...at different times of the year maybe? Just the way I'm thinking and go about things.