The flip side of this for rubber band wing mounting is that it forces the student pilot to get into the practice of trimming the plane out, which is a good thing.

I say that because there is a couple of guys in our club that fly without touching the trim, then complain all the time that their plane does not fly right. In one case, I went over to watch, then asked him if he trimmed the plane. He said no so I asked him to give met he controls, I trimmed it up for him, and he was absolutely amazed that it flew "so much better"!!

A week later, he was back out, flying the same plane, and, again, it was way out of trim.. and he flew it that way until he crashed it on landing.

CGr.