I created a map that has skinny side pathways around the sides of the map. It will be interesting for some surprise attacks especially in 4 team fortress. Right now I have it for 4 Team Fortress, I'll make it for 2 teams also. (The pathways are 3 grid lengths wide. You can barely see them on the preview).
Acces the map by typing: MAP_FILE Durka/fortress/side_chutes-0.0.1.aamap.xml in your console window