An alignment pattern comprises at least a sloped surface which communicates between a top surface of an inter-layer insulator extending over a surface of a substrate and a field oxide film selectively formed over the surface of the substrate and a flat surface of a metal plug, and the flat surface being lower in level than the top surface of the inter-layer insulator. The drill bit system may include a chassis, a head, and a first plurality of gauge pads. The coefficient values are modified to generate a modified coefficient block subject to a set of pre-determined constraints including a constraint that the relevant pixels have a same value in an inverse transformation of the modified coefficient block as in the selected block. At least one aperture is formed in the chamber to couple to a light source and to direct light from the light source to at least a first portion of the diffuse reflective material. A lower door of the gaming machine has a lower end which is ako pivotally connected to the cabinet so as to be pivotable with respect to the cabinet between a closed position and an open position. This clamping system is typically used to clamp a piping system, of the type commonly used to suspend a basketball backboard and basket, to an open web steel joist of a gymnasium.