daz2007 has recently released his own Baserace version. Same formula, other environment.
Here are all the elements he shared with us:

Changes:
Objective is No Longer Inside the Base for Better Balance and less Spawn killing
Added a Pond In the Centre of the Map
Scrapped the Red/Blue Theme
Scrapped the Fog which is now Substituted for Forestry
Added New Sounds
Tons of Changes and Improvements

Open for Suggestions and Please Report Bugs
See which servers are running the map and download the file at the TrackBase map page !

Source: Splash Damage forums