The other day the current owner of the DC-3/C47 was at the field with the plane I had mentioned earlier.
He made the comment that he added a gyro on the rudder not because of the engine out performance but rather that it was a real bear as far as ground handling, as well as takeoff and landing.
Just some information I though the original poster might find useful.
Apparently the rudder is not all that effective at low speeds...
He also added that he is going to add the split flaps as well, now he flies multi-engine aircraft all the time including a p-38 so I would heed his advice.