Here is a version integrated into the design. I triangulate the front end, taper fold the leading edge, and leave about an inch and a half for the winglet. This is cut on the bias, so the front cut meets the wing at the halfway point of the width of the winglet. The rear cut is parallel. Roll this up and the tip of the winglet is attached at the front, and the rear remains attached, creating a spiral. I added launching gear (retractable) for overhand throws and display.