sorry, maybe I haven't explained myself.
I am not thinking of managing production (even if there are absurd costraints, as the historical number of vehicles / aircraft produced for each single model-submodel!) but only of being able to prioritize the only basic and limited resource of Germany, the coal (pratically, in the game = 'resource') between the industrial production (HI) and synthetic fuel, at least until the fuel industry is destroyed ...
After all, we are talking about a simulation, over a period of four years: if the result must be absolutely the same as the historical one, in every details, it is not worth trying ...
And then, it seems to me, that WitE 1 allowed production to be reduced for each country, in order to maintain reserves of essential resources ... Here, it seems to me, this possibility has also been removed ... maybe I'm wrong ...