If the IVO IFA is set up properly, just as the electric motor is starting to run to the end of its limits (and is starting to bind) the circuit breaker should turn off. I move my IVO prop switch probably 20 to 30 times every time I fly and I've had the same prop motor for more than a decade.

My recommendation to anyone going with an IVO IFA: Follow the directions on how to set up the limiting washers so the motor isn't overloaded, and do not shorten the wires for the switch and the breaker as the resistance in the wire is part of the design.

Maybe I've just been lucky all these years with my motor, but my luck usually goes the other way

Oh, and I have another plane that has a Hartzel Constant Speed prop on it. It works very well, but it also costs 20+ grand. By comparison the IVO is a incredible value. If they could just solve the short life stainless leading edge tape issue I would be tickled pink over the IVO IFA.