The significant horns on the Zimmer were not operational. After fixing them, I modified the controls so I could operate them from the Nardi wheel! This is a Zimmer mod. First, the idea is to use paddles to operate the horns. However, turning the wheel will clash additional cables, so I designed a set of wireless paddles. The paddles, I designed and printed on my 3D printer. I designed them to contain a 'remote' from a cheap Ali-express remote relais set. The left paddle operates one relay, the richt paddle operates another. The tension of the remote buttons is enough to push the paddle back after usage. The receiver will be mounted under the hood, close to the power lines to the compressors. So wireless paddles can not interfere with the steering function. https://photos.google.com/photo/AF1QipOFNPSSYOrjnsndNvI1jB7a1igb5ydxWNKnU_Pr Be advised, I re-tube the horns, so one compressor is for