Fin Jig

I got the idea for this fin jig from the book "Handbook of Model Rocketry" by G. Harry Stine. This is a great book with lot's of great ideas and little shop tools that you can make yourself. This jig holds the fin on almost perfectly straight. The only way to hold it on straighter while the glue dries is with a very complicated and expensive tool. It is a piece of 90 degree corner moulding with a 1/8 or 1/16 cut right in the middle. The effect is holding the fin steady while not touching the actual glue area. This prevents the jig from being glued to the rocket.