I have a Sig 1/4 scale clip wing cub that needs a new windshield. I bought the plane in about 1994 or so from a fellow at the Ankeny, IA EXPO. I do not have the plans. I think the windshield pattern is on the plans but am not sure. I don't know if I can get the old windshield off in one or more pieces to get a good enough pattern to make the new one. Any ideas?