I practiced this with 7-8 planes. The effect using this method was
- turns are much flatter. You could even make them completely flat; but that doesn't seem to work as well as "sort of flat but with some bank"
- turns are slower;
- tighter turn

Enough opposite aileron to make a completely flat turn did not seem to work as well as allowing some amount of banking.

My initial exploration into this topic was to learn how to use rudder, as I have mostly (100%) been using aileron only for turns, and only using rudder for take-off. I think rudder is better for landing; banking at low altitude sometimes doesn't work very well (for example, scrape round with one wing!). As I am practicing this maneuver, I am finding that my fingers are becoming better at coordinating between rudder and aileron, which was the original desire.

For some of the planes, starting the turn with aileron only doesn't work as well as starting with rudder, and then introduce aileron. Each plane seems to have its own unique combination of how much rudder vs aileron, and when to apply it, that results in a flat, tight turn. The Albatros didn't like reverse rudder/aileron at all, and just about wouldn't turn with rudder only

But maybe my RealFlight works differently than others!!

When I said "need opposite rudder/aileron to turn successfully", I meant "need opposite rudder/aileron to flatten the turn and turn tighter than by using aileron only".

Regards