2. Talk about getting your money's worth, I bought this Makita 9207SPB two-speed polisher in the early 1970s. In the 2,000-3,800-rpm range, it takes a while to train one's ear to sense (hear) the right rpm. You'll have to learn flicking the switch at the right time to control rpm. It's much easier with a new-age polisher to match the rpm of the polisher with the rpm recommended on the rubbing compound label. Mothers recommend 1,500 rpm.