Stonehenge 181
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Stonehenge

Stone Shifting

<i>BTW Does anyone else think that this might be good etiquette to do this in future when a thread gets longer than, say, 100 replies?</i>

Cue another 15-20 posts agreeing with this idea...

(I agree, FWIW)

OK I'll start a continuation thread with a summary of this one, but it won't be immediately as even a summary is a bit complicated. So please keep posting to this in the meantime.