Strengthen your build with the Boyce Aerospace Hobbies Honest John Fin Upgrade for the Estes Maxi Honest John. Our Honest John Fin Upgrade allows you to get rid of those wimpy vacuformed fins and replace them with these high-quality direct glue on replacements. The fins are 3D printed in high-quality white ABS on Raise 3D printers. The fin set weighs in at 3.2oz

Boyce Aerospace Hobbies recommends hobbyists under the age of 13 be supervised by an adult at all times.