If you wonder about the results you'd get from increasing the chord, it takes about 5 minutes to tape the stiff paper around the control surfaces. The rudder takes less. And you can fly the sucker almost right away and find out in one session.

We were originally worried that what we thought was going to look like a lashup wasn't going to be strong enough. So some of the first trial setups had small balsa ribs to hold the paper's shape. We discovered they weren't needed if the paper was stiff enough.