Somebody on Britarch re-mentioned it recently , seems dead reasonable to me.
Uphill would be difficult but downhill towards Avebury would be spectacular. A bit like curling!
You have the problem of stopping it sliding down hills at great speed when you're trying to pull the stone upwards. When going uphill the friction is actually your friend in one way :-)
Unless otherwise stated, the copyright in each work is the property of the respective contributor. For usage or questions, contact [email protected].