About the wingtip rails, I'm am not too sure what you guys mean. The launch rails themselves are molded as separate peces that glue onto the wing tip. There is the base it goes onto which sticks out in front of the leading dege of the wing a little, but both of my Hasegawa Hornets had a sprue "box" around them to keep them from bending or breaking off. It it a real nice kit and I highly recommend it. One big tip is to take your time on it an carefully test fit and align everything before gluing and the fit will be virtually prefect.