Machinbird -
And before all the B guys get too smug, ask yourselves what would happen in your machine if critical displays and systems continually were shuttled between busses by an intermittent electrical problem?
Maybe that's why us "D" guys never worried, as you could take every switch and lever in the cockpit [except the fuel shut-offs and tank selectors] and place them in other than their normal position and all you lost was some lights and "power steering" !!