In the quest for 'snap roll' perfection, here's an improved version.
As I'm using a
button for rudder pedals so there is a slight delay in a/c reaction which I tried to synchronise with the elevator.
This little roll does not deviate more than about 75ft. but with proper rudder pedals one can do this on the fly. I know, as I've done it a gazillion times in a FW with my
pre-working rudder pedals
Another thing to point out is that that video looks like it was taken at about 10000 ft altitude where the air is thinner (not much more than this as lack of oxygen will make the pilot 'happy'). So I set this test at 3000m with results getting really tight
This about my 10th snap in the KI43 (never flown it before)