Hi Tom, we had a simular issue with our 2006 Raymarine autopilot, the computer went out, not the head or compass. We replaced with the new Raymarine EVO unit and N2K adaptor. It was plug and play for our install and has worked flawlessly for a year. Also, no turning in circles to get a fluxgate compass to zero out. It was nice to have the backwards compatibility with the C120 chart plotter that still works well. You can contact me offline if you would like.