Hi Rob, the diagram looks great. I've got a couple of switches on order. I was thinking that you could provide the same functionality with Three automotive relays (start power, ground and emergency battery) and some simpler and cheaper one pole switches. Maybe it might even be a product idea for someone - a little panel with Two switches and connections on the back for the three FB pins, start ground and battery.
I was also wondering if I could put a warning light on the instrument panel that glows when start power (pin2) is powered up - I'm a forgetful klutz when it comes to switching things off, raising the landing gear, etc. However I don't know if there is a voltage on that pin when then engine is running.
