It is more relevant in gliders I guess
Same goes for gliders, don't use "top rudder"! I'm a glider pilot as well and can tell you they fly just the same as any other conventional airplane. They just don't have power so you're usually descending slowly unless in a thermal.
It sounds like you're doing the turn properly if you're keeping the ball centred. I was just mostly worried about people reading that and thinking that "top rudder" is OK to be used in a steep turn. Flight instructors already encounter many common problems in training and keeping this myth circulating will just make it worse!