Hi Folks! I want to find a single speed router that has brushes rather than being a induction motor. I am shopping on ebay for used since I want to use it to make a Bowling ball spinner. I will plug it in through a Router Speed Control and they require a motor with brushes and not a variable speed. Any ideas on a powerful model or brand to look for? I guess I should ask if all routers have brushes? Thanks for your time.