Found this on the internet, thought great idea, got one made and installed. The rudder on full lock will contact the 0.032 spar web, the 0.040 doubler and the 0.063 rudder horn. As the designer says it should give a bit of added security in case of a hard rudder jab on the pedals. Made some spacers to go in between bottom bearing of the rudder, works a treat.
