A link to an archive with all maps discussed in this topic will appear in this post soon.
You may download ALL custom maps mentioned in the map cycle using
this link ( 80.8 MB ). The archive includes .nav files for every map. If .nav file is missing it means it is stored inside .bsp.
This link will be accessible for 7 days only.
I am uploading another archive now, it will include other maps, which I decided not to include in the map cycle but which you might find interesting to look at (de_russka, de_tuscan and de_pyramid_css).
I had a look at tuscan while creating a .nav file for it. It appears to be cpl_mill in disguise. AFAIK, CEVO tournament organizers aren't allowed to use CPL maps so they had to come up with their own arenas. Tuscan is basically mill re-textured to look like a mediterranean town with a couple of minor changes to several approach paths.
Other custom maps I recommend ( 33.1 MB )