I remember that trick, but as you know it was also a refuted line of play. I remember the Germans took it lite and brought that tank to EE and took back Ukraine and Caucasus.
I think that’s impossible in 1941. The Soviets can build 6 tanks with 30 IPC, but Germany would have at least that many defending to make it a mutual death going slightly against the Soviets and they cant afford to trade a turns worth of builds.
I think it may work in 1942, as long as the Soviets take the southern territories ( UKraine, Belo, East Ukraine), because they at least have air units and a lot more tanks.
I remember the leave Karelia tactic in MB required a 3 tank, 3 Infantry buy with 24 IPC