The electrical system of our Sportsman is rather complex but beautifully built mainly by Doug Hanson. However, the avionics panel we chose a professional avionics shop to assemble, namely John Starke, in Georgia. However, that still left a mountain of wiring to be done to connect the instrument panel avionics to all sorts of engine temperature sensors, pressure sensors, lighting in the wings, and in the cockpit (even in the baggage area!).