Has any research been done into the parts of the grappling rocket? I'm specifically interested in the metal sleeve and fins on the supertrooper costume. From the best I can tell this part looks to be either the base off of an old military surplus rocket/missile or part of a rocket flare. I have found some very similar parts but very few seem to only have three fins. Also does anyone know the width of the metal band that the fins mount to on the supertrooper rocket?