Sorry I can't relate that back to how more responsive you want the FSone model to be. Also I don't own a BCX so I can only help you in regards to the FSOne model. We re talking about the counter rotating heli, right? There a few adjustments you can make to modify the model, but it'll never be as agile as say the Blade CP Pro model. Just give me an idea how much more agility your looking for in the model and I'll try to explain the fields you can try to change.
Scott