[rotorwrench]

The cut out would likely do better if it uses a power diode instead of an electro-mechanical set up. When running a 3-brush, a person has to have the battery connected to get the proper operating voltage. There is no regulator unless a person has one of the modern 12-volt regulators like the Fun Products type for example but even with those, there has to be a battery in the system to prevent damage to the regulator. The field can be flashed with the cut out or regulator isolated. All a person needs it the proper residual magnetic polarity in the field pole shoes to get the genny going again.