Thanks again Bill. Your comments are greatly appreciated and will be acted upon. I understand the ground issues and will almost certainly not even bother with the LEDs. IF I use the LEDs then they will use a separate bus and aircraft ground on the opposite side of the switch to the Rotax components. In other words, that supply will be only to power the LEDs and not in any way connected to the Rotax circuit or ground system.
I am also looking at guards for the switches. The side guards for the Lane and Fuel Pump switches are pretty easily dealt with but the best solution I've come top with so far for guarding the whole of the rocker switch for the Back Up Battery is something from a Kenwood truck. I think I might have to continue the search :-)
