Probably a bit of a spanner in the current ideas' works...but has it ever been established as to ,how much "repair" work Mr. Keiller and his gang carried out on the stones when they were re-erecting them?
Apparently, he had a load of nice blueish stones that he saw on a holiday in the Preselli Mountains brought in to fill some empty post-holes to make it look pretty. ;)
Seriously though, I started to think that maybe the glacier theory wasn't so far fetched as I initially thought. But then you totally lost me with this "folly" stuff! That's some f*@king folly! I can't imagine anyone going to quite so much effort as moving the massive Stonehenge stones an inch without there being a f*@king good reason! :D
Apologies if this has been talked to death already - I've been away so unable to keep up as much as I could normally. I've only read selected few posts to try to catch up.