Another thought occurred . Before i was interested in neolithic monuments i thought that the stones which were moved from s.wales were the huge sarsens . and i find now talking to folks that a lot of people still think it was the sarsens which were moved. Has this caused a sort of mental block in peoples thinking ? to move a 30 ton stone even ship it by sea would be incredible but untrue anyway in this case .
I think its peoples preconceptions which "stop " the bluestones being moved.