Thank you everyone, I'm glad most people seem to like it. I tried to design the map to generate constant action for both GVers and flyers.
The TT crater rim is not high enough to prevent air attack completely but it will increase transit times enough to reduce the frequency of attacks. There are three notches on the rim which are about 2000 ft lower than the rest of the rim and these should make good spots for fighters to ambush TT griefers.
I thought about making some of the TT bases uncapturable but decided against it. However I did make the bases easier to capture from the spawns towards the rim of the crater than from those nearer the centre.
One thing that is missing from the map at present is the weather system I designed for it. The latest version of AH requires all terrains' weather files be redone, but the editors for doing that aren't out yet. The old weather included stuff like cloud banks to hide fleets under, cloud cover over the TT bases and even a volcano that vented steam from time to time.