Parigoris rudder mods ain't quite a Singleton mod, but makes us feel pretty comfortable. I doubt our control horn is going to fall off. More robust rudder stop will be incorporated on right side, and stop will be installed on tailwheel horn. I wish I had known at beginning of build to put half of hinge on control surface and have pin lock to the control surface. This way when hinge wears out, you just remove pin and easily replace half of hinge and pin. Other way round harder to do, grind down to rivets, drill rivets, bust out old hinge, Redux new hinge in place while filling old holes, drill new holes, rivet, cover rivet heads, fill and paint, and also replace easy to get to hinge and pin. Our ailerons are built with hinges backwards, guess will just use rudder to roll!