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2:57 AM
The first half of the connections are done -- at least for a first-draft layout, but really once a first draft is finished and working, why would anyone go back and rebuild it all? It requires an improbable streak of masochism to try this kind of thing even once:
http://www.conwaylife.com/forums/viewtopic.php?f=2&t=2865&p=62073#p62073
It's not entirely clear yet that there will be room for the other half of the circuitry and any decent metapixel area. But there's still some space left, and even a small metapixel area will be pretty visible at moderate zoom levels.
 

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