I have seen gun footage of Stuka's hitting T-34's with one cannon (knocking out the T-34's). There is a you-tube video of Stuka's using the BK against Russian landing craft in February 1943, at the Black Sea in Russia during the battle of the Kuban Bridgehead. In the video, they were using both. It's possible the pilot had the ground crews redo the firing sequence for the cannons, or he may have done it himself (doubt that but it may be plausible). I don't think you could switch between the two modes in flight, not in real life. Though I have not flown a WW2 bird either.
There is a you-tube video somewhere of a person in Germany, who flew around in a 7/10 scale Stuka, a D-3 if I recall correctly. He mentioned in the info that Ulrich Rudel flew his replica. I'm having a lot of trouble finding this video though.
I wonder how many here, would like to take it up?
The British have the Hurricane IID, the Russians have IL-2. I say, let the Germans have their BK 37's!
Yep...drooling again...