Place cooled macaroni, onion, celery, chopped eggs, salt, pepper, dill weed and red pepper together in a large mixing bowl. Stir to combine ingredients. Spoon mayonnaise on macaroni and mix until ingredients are all covered. If more mayonnaise is needed, add gradually until moist enough for your taste. Remember, if you make this ahead of time, the pasta will absorb the mayonnaise and it may be a little dry. Check this before serving. Makes 8-10 servings. Enjoy!