Did some playing around with electric twins, for the ability to stop and restart the motors in flight.
I found with this Gentle Lady mod that with more than 40% power on the running motor, there wasn't sufficient rudder authority to turn the airplane towards the running motor, in any configuration.. tractor, pusher or push pull.
Making the single motor Mirage with the GL wing into a twin, I had to add rudder area to get decent images from the camdorder. The directional variations without the added area were too distracting.
On one of the flights with the camcorder twin, the right prop fell off.. making the plane very difficult to turn to the left with power on.