A method and apparatus for providing combined radial and timing multislot self-servowrite propagation is disclosed. The electrical connector includes a mating portion and a retaining portion. The cam has at least one lobe for engaging at least one safety-switch for actuation by the at least one lobe of the cam as the cam rotates. In another embodiment, the transgenic fish may be used methods of identifying mutations that modulate oncogene-mediated neoplastic or hyperplastic transformation, or that modulate sensitivity to chemotherapy or radiation therapy. Hardness can be improved by UV irradiation of a component. The innovation lies in the air pump adjustable \u201clift\u201d bladder that creates the adjustable incline traction.