Hello group as you will he able to tell from my question I am a beginner, I have a very basic question, I have a buddy that has a 12 volt dc motor on a spreader, he wants to add a speed controller, he doesn't know if the motor is a brushed or brushles motor. He bought a speed controller that says it is compatible with a brushed motor will this work on both a brushed and brushless motor? What does need to watch out for to protect the motor and controller? TIA