I thought about the same thing when I finished mine a couple of months ago. But if you notice the throw differential, you have more throw on one ail. down than up. The opposite ail. makes up the difference when you roll it. Trust me, I have a saito .82 on mine and it is plenty of power and the roll rate is good. If you are looking at 3d rates not happening. But it actually has a scale roll when you take it nose up and start the roll. love this little biplane, just tricky on landings. i had to add so much nose weight to balance it out that if you don't have enough up elevator once you touch down to keep the tail on the ground it will nose over. All it takes is a few nose overs and you figure it out.

LeeLee