and the works of cyberpunk writer William Gibson. The video projection system consisted of four Vidiwalls, four rear projection screens using eighteen GE Talaria 5055 HB light valve projectors, and thirty-six Barco monitors. The production control system, which was operated by Dodds and a crew of 18 people, included ten Pioneer LDV8000 LaserDisc players, two Sony Betacam SP BVW-75 tape decks, two Sony 9800 -inch SP tape decks, four Ikegami HL-55A CCD cameras, two Sony Video8 Handycams (nicknamed "Bonocams"), and one point-of-view camera. The video equipment cost more than US$3.5 million. Williams faced difficulties in designing the outdoor lighting system, as the stage did not have a roof. He settled on using the venues' house spotlights and strategically placing lights in the structure behind the band. About a third of the lighting equipment was lifted by a tower, requiring of ballast. Lighting was also provided by 11 Trabants; two were suspended from cranes while the others were supported by a hydraulic system. The audio system for the larger stage used 176 speaker enclosures containing 312 woofers, 592 mid-range drivers, and 604 high-frequency drivers. The system used about one million watts of power and weighed . U2 were Clair Brothers' first client to use the company's nascent "flying" PA system, which designers were able to position behind the staging area. The front of house position featured three mixing stations, each with 40-channel capabilities. The stage monitor system used 60 speakers, which were mixed from two separate positions, each with two consoles providing 160-channel capacities. On stage, 26 microphones were used. The North American stadium leg employed a 145-person production crew and 45-person staging crew that travelled on 12 buses and a 40-passenger chartered jet known as the Zoo Plane. Two separate steel sets were used during the tour; while one was in use for a concert, another was in transit to the next venue. The tour required 52 trucks to transport of equipment—12 trucks for each of the two steel sets and 28 for the production equipment. The concerts were powered by four generators and of cabling. Stage construction required more than 200 local labourers, 12 forklifts, and a , crane. The million-dollar stage was built in 40 hours and disassembled in six. European stadium leg The outdoor stage used for the 1993 legs of the tour was smaller due to budget concerns, and it discarded the Trabants hung from cranes,