Minn,
You make that sound so easy. I have to say it drives me nuts...

This probably doesn't matter much for your model, but if you're putting in a larger engine that turns a larger prop than the model's designer chose, you may find you need a bit more right-thrust to get the same effect. I've run into this a few times.

Of course, this really only matters on aerobatic planes where the desire is to get a plane flying as close to "perfect" as possible. On scale planes, it's just "character" to need a bunch of rudder with elevator application and so on. .