RE: First flight with Aerobird Challenger
Put a long strip of reinforced packing tape (the one with the stripes in it) on both side edges of the wing, where the rubberbands are. This will not only prevent it from being cut by the rubberbands, but also helps when the wing hits the propeller on a rough landing. Usually the wing splits apart when this happens. However, with packing tape around the edges, the wing won't be cut... Make sure you don't use too much tape since it adds weight, but one long strip on each side will be fine and you won't notice the added weight!
Dennis