A bonus element interleaved wagering system is disclosed. The computer system has a first operating system operated in a high power mode and a second operating system operated in a low power mode. The invention further provides a method of purifying 5-ethylidene-2-norbornene to form a purified 5-ethylidene-2-norbornene, which comprises low levels of impurities, as determined by the absorbances of the above wavelengths. The position of the upper and lower trays relative to one another can be adjusted both horizontally and vertically.