AAIK,
If you are only creating 10x10 sector (2048x2048) terrain , you can do that with the free version of L3DT. The Pro version allows for a 4096x4096 work space. My terrains with the 25k mountain ring create a hybrid sized arena where the combat space is 14x14 sectors. Then you arrange the base objects to provide activity for prime time large groups and off prime small groups. The wheel design is good for that configuration. If AH gets on Steam and numbers increase, the wheel design will be too easy to flip the map by larger groups of players. At least it will be fun while the map lasts for them.