Oh agreed, and the perpetual motion machine that is the Crusader production line <thinks - if we ask them really nicely, do you think we could persuade the Luftwaffe to bomb the damned place? It's the only way I can see to stop it! Eek > will happily provide most of the hulls for AA tank needs - in fact having the AA Crusaders accompany the Crusader APCs (say 1 x AA per infantry platoon?) as an integral part of the unit provides the PBI with additional close support firepower, as well as insurance against air attack.

My thought was that if you're going to have Vortex armed with twin 20mm then ensure that they are capable (elevation of gun, speed of turret traverse etc) of using them as effective AA weapons. Close support would still be the primary role, but having the ability to do AA as a secondary duty is a "nice to have", and serves to protect Arras from the main threat - air attack.