As for the flaps, yes, the Harvard isn't quite as fast as the Mustang. The T28 would have been better - that can formate on a Canberra
Did you enjoy the audio?
We'd accentuated the yelps from our mate, Rob Fox who I think had more than what you said you had while watching the Mustang roar over our heads and in fact totally lost control, causing Brian, our sound man to frown at him for wrecking the audio.