This is the downside to ARFs. To build them quickly the 9 year old sweat shop workers have "hot glue" guns and whip these things out on an assembly line. Using propper glues will get you a much stronger airframe. This "rubber like" glue is my #1 argument for building your own planes. Don't get me wrong. I have some ARFs too. But I know my built planes will out live them all.