In my E-File I have identical units in both AD and Flak categories so people can choose, but I can't make them have the same characteristics, which is kind of silly... Example, the German "88mm Flak":
As an "Air Defense" type unit, it has: Intercept: 2 - Air Attack: 3 - Air Defense: 3
As a "Flak" type unit, it has: Intercept: 2 - Air Attack: 3 - Air Defense: 2
The issue is that for the Flak type units the "Air Defense" value is a general, one-size-fits-all setting in the E-File's .cfg file ("flak_range" setting), the same for all Flaks, be it a puny 7.62 mm MG or a huge 128 mm AA gun.

It so happens that I prefer using the "Flak" type versions, because indeed most of the AA guns in WWII were dual purpose by design. After all the first AA guns were normal field guns in a special mount, and AT guns were more often than not repurposed AA guns, because both had the same requirements (high muzzle velocity, flat trajectory).
Having a special category for units exclusively shooting at planes is IMHO unrealistic and also tactically quite cumbersome: In my own armies I gladly accept a lower efficiency against planes for the greater tactical flexibility and realism of "Flaks" (allowing my AA batteries to tackle ground targets).
Rommel is famous for having used his "88 mm Flak 18" batteries to destroy the otherwise indestructible British "Mathilda II" tanks, but at that point the idea wasn't new: Already during the invasion of France the only towed gun able to tackle the French heavy tank "Char B1" (and the British "Matilda II" already) was the 88... And the Germans weren't the only to do it, actually they all did it, Americans, Soviets, all.
IMHO "Flaks" should be the main (if only) category of AA armament in OG. Except maybe for some very specific cases like surface-to-air missiles or such. I really don't know why "Panzer General" games installed that dual system, but in my humble opinion it's not a good system.
So guys, what's your opinions on the subject (except "no more changes please"
