Today was the last day of the Electrical Systems and Avionics workshop. We learned more about wiring, antennas and simple circuits. The lab portion was spent building a small panel mockup, using a potentiometer, fuse, switch and lightbulbs, mounted in an aluminum "box." I am happy to report that mine worked flawlessly. I feel that this course was money well spent and would recommend it to anyone else building an RV.