The accepted, usual manner is to use 2- 1/4x20 nylon bolts close to tr. edge of wing; and a 1/4 inch pc.of dowel centered in leading edge that slides into a 1/4 inch hole in fuselage former. This former must be reinforced with 1/8 inch plywood in that area where hole is drilled. Definitely a better way than rubber bands.Perhaps you can find someone that has this for you to check it out, or cosult some plans.