I had already drilled mine too. I would have been glad to pay a rental fee for the peace of mind. It made me a little nervous to do it freehand but it worked fine and drilled much easier than I expected. I think anyone who has used a proper tool (balancer press) to install dampers will agree that this sure beats pounding them on. I would be very hesitant to try to pull one on with just a bolt.
Chuck
