Good point da Rock. A neutral balanced plane will be very light on it's responses.

The exponential rates, if you have a transmitter capable of those, are a good idea. I had them on my Contender 60 with an OS F70-II. Talk about a jerky plane. I ended up going back to straight rates and just pulling out the Contender when I feel like a "hot" plane. Smooth is how you fly it. If you are reacting you tend to fly jerky. If you are grooved and anticipating 20 feet ahead of it it is smooth, though fast.

You might also try holding your sticks with thumb and forefinger instead of just thumbs. A light touch is something that comes with time, practice and confidence. Warbirds in general are relatively unstable (or they'd be sitting ducks) and take minimal control input. If you throw the sticks around it will fly all asses and elbows. Hum a slow and easy song to get your timing smooth.

That Cap 232 ought to be able to out maneuver your H9 P-51 all ways to Sunday. (in other words even less smooth on it's own . . . so don't let it be on it's own).