A ball mounting apparatus for mounting a plurality of balls sucked up and held by a head onto a workpiece. R\u2014q-CO\u2014N\u2014C\u2014CO\u2014NH2\u2003\u2003. The front end assembly is positionable between a safety configuration and a working configuration. The methods further include modifying the removal selectivity of the surface material relative to material protected by the localized masking. The resulting hanger beam assembly is light-weight and provides a desired natural frequency at the associated steering wheel. The working fluid inlet pipe is connected with this inner cavity and further with the heat absorbing cavity via the outlet of this inner cavity.