Sears carries Gorilla glue, as does most hardware stores. Its polyurethane glue, and must be used with water - follow the directions. What makes it good for the wing tips is that is foams up and expands, forming natural glue gussets INSIDE the wing tip, so you can feel free to trim the tip plate completely flush on the outside, and there is still plenty of glue on the inside... all from a tiny bead to start with! It's good for lots of SPAD stuff, but it takes several hours to cure.