Hi! In general, this post provides a great summary of documentation for the CCF.
As you noted, we added many new annotations last year as part of an early-release to expand annotations to the hippocampus and olfactory bulb. Those are described in this paper.
We do not have any immediate plans to release 25, 50, or 100um versions. However, we’re always interested in feedback from the community. Which version would be most valuable to you? What would these additional versions help with specifically in your work? Is this more a nice to have or absolutely invaluable?