Does anyone know anything about this "Clarkson Flight Control" wing leveler system. I had assumed that I had a PC System on my M20B until I started looking for the LH yoke mounted switch and couldn.t find one. The system I have is mounted under the instrument panel on the left side of the Johnson Bar. It is a round guage looking piece of equipment that says, "Clarkson Flight Control." On the bottom left corner is a push-pull knurled button that you pull to turn ON. On the bottom right corner is a knurled knob that says, "Sensor." Thanks for any input from you guys.