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Various problems with the newer [site#2] have made me decide to combine the non-overlapping content of [site#2] into [site#1], putting some of it in a new directory and distributing other pages to existing directories which are appropriate. I think the non-overlapping content would be about 160 pages.
I would remove the contents of [site#2] entirely and put up a redirect to the newly created directory on [site#1].
What I'm wondering is how many pages I can add to the site [site#1] and at what intervals, without getting re-sandboxed.