I think the newer versions of the He 111 and Ju 88 bombers would have been elevated in some way with longer fuselages for extra fuel and this would have been the way to attack the Soviet factories beyond the Urals. It is so hard to say since history did not happen this way, but can only presume that if Moscow had been taken and General winter had not affected the Wehrmacht the way it did, who then knows what may well would have happened.... ?

E