I made the plug from balsa and ply. Then laid up a five part mold from polyester resin. Extremely tedious process but the neat thing about it is, if I lawn dart it I can always lay up another and try again. I just hope the incidence angles that are built into the molds work out (stole them from the full scale). If interested, I could post a pic of one of the mold parts and explain how it was done.

John Fangohr