He also designed the rudder extension that they have adopted in the tail dragger version, as I mentioned previously, we talked about it on the phone one night and about two days later when I turned up over there, he had the parts for the version 2.0 lying on the bench ready to install. His version had more stiffeners in the rear of the fin to support the extra load but when I bought the factory version for my kit it was much simpler, modifying only the top of the rudder.