No upgrade to Bf109 F-4

[Chubb]

Its Aug 41 and I see there are F4 waiting in production available, but I can't do a manual upgrade from F2 to F4? All other types are listed, (E7 etc) but not the available F-4s. Anyone else see this?

[Jango32]

You need to wait a full month after a model has started production before you can switch to it for arbitrary game design reasons.

[Chubb]

Thanks for that. I knew that there were pre-official production run equipped gruppe, but it seemed strange that AI it didn't see the need to fill in depleted gruppe when there were ac in the pool. Anyways thanks - good answer = patience is evidently a virtue I don't have...