A control assembly for use with hydraulic apparatus having a housing, a trunnion extending from the housing, a return arm and a control arm mounted on the trunnion. An apparatus for practicing said measuring method. Noise generated by a digital circuit and inputoutput circuitry to be implemented in the integrated circuit are estimated. This allows for improved end point detection of the NVM gate stack etch due to increased endpoint material being exposed at the end of the etch. In a preferred embodiment, the performance measuring system integrates with the rating system to provide seamless athletic data collection and rating of athletes.