Wild speculation - do you think there could be any benefit from creating two sets of chunks with one set at a different offset from the first? So like, the boundary between chunks in the first set would be near the middle of a chunk in the second set?
No, it's better to just create summaries of all the chunks, and return summaries of chunks that are adjacent to chunks that are being retrieved. That gives you edge context without the duplication. Having 50% duplicated chunks is just going to burn context, or force you to do more pre-processing of your context.
