Jas
good post and well observed.
The topic of AOB is an interesting one. 60 degrees will yield a better result, simple as that in theory.
In practise though depending on vision and ability to keep a light buffet in a coordinated turn a 45 is possibly a better compromise. We chose to fly 45, perhaps the master thought the student would struggle with more
What we needs is for Ultralights to strap his camera on the Savvy and see what it can do, if nothing else but to prove it all depends on the equipment you fly.
KNOW YOUR AEROPLANE