A spacer between adjacent balls of, for example, a ball screw device or a linear motion device has an outer periphery that is concave such that the spacer is elastically deformed to be in substantially circular line contact with the adjacent balls and that a distance therebetween is variable. Certain embodiments of the invention comprise isolating dielectric layers from conductive layers using an etch stop layer to facilitate controlled removal of portions of the dielectric layers and formation of air gaps or voids. The apparatus further includes a set of voltage-controlled delay lines to generate phase outputs based on the delay signal, where the phase outputs are provided by the apparatus to a clock generator unit to generate an oversampled clock signal for data recovery by a receiver. 050 inches and the life expectancy of the bushing is at least doubled. This enables read operations to access a specific cache line as if absolutely addressable based on only a partial address and the known tag setting. The awning assembly is mounted so that it can be moved between a downwardly directed vertical position and an upwardly directed vertical position, and to an intermediate horizontal position between the downwardly directed vertical position and an upwardly directed vertical position, allowing the awning to provide shade and to serve as a holder for signage.