Where did i mention knife edge turns which requires opposite rudder?
I posted to use coordinated rudder to keep the tail from DROPPING. That's just the opposite of what is done during knife edge turns.

I see it all the time, both when I fly & on YouTube. People try to turn W/moderate bank & the tail drops. The nose is pointed skyward & the turn is not "level" as far as the fuselage & the line of flight.

The fuselage is not an airfold that provides significant lift. You need the rudder to lift the tail a bit, especially if there's no aileron differential & the aileron on the high wing is inducing drag..

It's so easy to set up the aileron linkage for aileron differential if you can't do it W/the Tx program. I don't know why it's not standard practice on non-aerobatic airframes.