Move the 2 auto acks in the center of town to the two corners that don't have acks. Place the 2 manned acks there...
No, that would really cut down on the field of fire for the ack guns. Idealy, you want the man guns in the corners, so you have the town completely (or almost anyway) covered with man gun fire. You want to be able to knock out the attacking planes, so that the attack never gets far enough along to use troops.
I'd even say add a single puffy ack, 90mm M2 preferably to keep people from rolling onto the field, camping the VH for the kills, and killing the rest of the hangers unopposed, and to give vulchers something to worry about. At least do this for the V bases, and ports as the ONE man gun, and wirb uppers aren't enough usually to keep a base.
Really, it seems field captures are a bit too easy. Attackers come in at 20k, kill hangers, and take the base without a single loss every time I even bother trying to defend.