Seems to me that the best way to free the wheel is not to worry about some type
of kill switch just disingage the lever. If that's not possible I recomend the
simple solution of installing the autopilot breaker in the cockpit. I mounted
mine alongside the Yanmar control panel. Having access to the breaker in the
cockpit also allows you to turn the thing off and not leave it in standby
without going below.
S/V Express 30 "Ringmaster"
"Trains are a winter sport"