In case you need to know.....Putting a bearing into a cassette.
Caution: Medical studies have shown that some male pattern baldness may be caused by first time installation of spherical bearings into cassettes. We have seen people try to press them in, grind them in, and pound them in before they realize how simple the installation is. Just insert the bearing through the notches on the backside of the cassette with the axis of the bearing perpendicular to the axis of the cassette. Then rotate the bearing until they are both on the same axis. (To rotate the bearing you will want to bolt the cassette in and use the axle for leverage) Piece of cake, once you know how!