A rail for holding drivable components within a case may include a body in which a plurality of receptacles configured to receive respective ones of the drivable components are formed, and a retention boss at each opposing end of the body. The retention boss may extend away from an end face of the body. The retention boss further includes an alignment slot formed therein. The rail is removable from or insertable into the case, and is rotatable relative to the case, based on alignment of the alignment slot with retention features formed in the case.