A sole structure including a cleat assembly is disclosed. Multiple wafer heads, preferably at least one greater in number than the number of polishing stations, can be loaded with individual wafers. A pair of locking elements are positioned within the housing and movable between a locked position, where the pair locking elements are adapted to lock a pair of male prongs inserted through the pair of openings in the housing, and an unlocked position, where the male prongs are unlocked and may be removed from the pair of openings. Upon rotation of a steering wheel, a valve connected with a pinion gear effects operation of the motor to turn the steerable vehicle wheels. , those fully or partially populated with components is addressed here by depositing a tin-whisker-impenetrable metal cap on all exposed tin coated surfaces in the circuit.