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Stone Shifting 2

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> Is it feasible to erect guide frames down either side of the hole?

> I'm just thinking that in the actual trilithon circle there's not much scope for the stone slipping sideways without hitting the stone next to it.

Sideways movement is not an issue. We only need to make sure that the pivot is correctly aligned with the hole and the stone will swing in the correct plane. There are no forces acting that would make the stone deviate sideways. The problem we are trying to solve is missing or overshooting the hole in a direction at right angles to the axis of rotation.

The bottom of the stone is unlikely to be flat. The bottom of the holes were never dug flat.

When you drop an uneven thing on to an uneven thing it could go anywhere.

Stonehenge may be the one example where the bottom of the stone 'might' have been flattened - most others are left rough. This is probably because Stonehenge was built by chippies, not stone masons.