An improved method and apparatus is set forth for packaging substrates in a monolith reactor, wherein the substrates are positioned in a stacked relationship along a longitudinal axis of the reactor housing. The invention’s tertiary collimator system consists of semi-automated reusable custom field shaping with tungsten powder or melted Cerrobend blocks. The bonus device is embedded with display technology that allows the bonus amounts, to change upon certain conditions in the base game such as an increased number of credits wagered, combinations achieved in the base game, or other random occurrences. The judge unit receives the output signal and generates a judge signal, which is enabled when the clock period of the output signal is longer than that of the clock signal.