An alignment assembly comprises an outer bushing received in an aperture of a work piece, and an eccentric bushing received in a passage of the inner bushing and rotated to align a passage of the eccentric bushing with passages of other work pieces andor alignment assemblies. In an implementation, the method includes displaying a keyboard including keys. The winglets on each side are oriented substantially in the same direction for deflecting the fluid to the same direction and conducting the fluid to an area behind the object. The organic polymer layer is preferably made of an acrylic resin, an epoxy resin, or a polymer material containing these that is deformed by an optical or thermal process to undergo a three-dimensional condensation polymerization, for higher compactness and hardness. Also provided are methods of utilizing retention lips, enlarged retaining washers, or clearance lips to retain a bearing race within a bearing housing in the event of bearing failure.