Sometimes I think instead of setting a year limit for aircraft, the host could select a theatre, so for instance if he selects "Battle of Britain" we play over England and the Channel in Emil's, Mk II's, He-111H-3's and Stuka's.
Select "Barbarossa" and we fly F-4s, H-6's, and so on and so forth.
Likewise with the B-17G, would be something like "Defense of Germany", fly on the Berlin map, would mean you'd need to allow 262's but I'd be for that because these aircraft did fight each other.
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