Eddie I have a question for you. Why is it that everyone swears they can only get 2-3 runs on brushes. I know there are exceptions but I find that the longer I run the brushes, the better the motor is. Obviously you reach a point when it starts to go down hill. But if you had a bell curve showing where your motor is the fastest I believe most people say its 2-4 runs when I say it's 4-8. I know there are a million variables but if your brushes are not discolored then they are still good... I guess I am old school. Perfect example....last week I ran a C2 that had F brushes in it. It had about 10 runs on it...the 11th run the motor died...it needed a rebuild. but the 6-10 runs were faster than ever!!!