Maybe you can extend the "Tiger"-line with E75 and the "Maus"-line with E100
Mods.
Absolutely amazing work. The gearing of factories to produce certain types, the reutilization of parts adds a lot of depth to the game, giving an extra incentive to not produce a dozen separate types of vehicles at the same time. I like to think that I'll produce Tigers in reasonable numbers but I'll probably spam the crap out of Panzer IVs and Panthers yet still lose the tank war.
How will variants be represented though? Like the Bf-109's different variants were not at all the same, the K-4 didn't have the same engine or guns as the E-3 for example, and there are big differences between the first Panther and the Ausf. G.