In the topic regarding the parking position of wood propellers the mention of turning the prop backwards in the interest of safety came up. This worked with impulse coupling mags but now there is a threat to safety as long as aviators believe turning backwards is safe.
The Electronic Ignitions will fire in either rotation. I'm not familiar with all of them but of those I am, they will fire in either direction of rotation. Also the notion that if the master is off the ignition is off is False. If it is wired as in the Lightspeed manual the ignition circuit is not run through the primary buss. The ignition is wired directly from the battery to a pair of circuit breakers and on to the system components. This is done so the engine will continue to run in the event there is some sort of emergency that requires the master be shut off. An option on this system is a backup battery that will power one of the ignitions in the event of a primary battery failure. The secondary battery is often mounted in another location and disconnecting the primary battery would not make the ignition safe unless the breakers for both of the ignitions were pulled.
These systems work well, but they present a new element of danger in propeller handling. Like most any thing else that is not part of the "Old School Common Knowledge" an awareness of their workings should be brought forth.