For Crazy tour Queen used a smaller version of the Pizza Oven to accomodate small venues in London. Instead of 5 columns of green and red, they were reduced to 4 columns like the white columns were. There were about 10-12 lights around the gong and they were colored white, red, and green to match the main rig. The same ceiling lights were used as from the Live Killers tour. There are rumours about having to drill a hole through the roof of the Rainbow Theatre in order for the rig to be supported.
Assembly of the rig varies according to the method of support. If the rig is hung from the ceiling, it will commence around 8:00 am to around 5:00 pm, approx. 9 hrs. If the ceiling is too weak to support, towers are built to give the support needed. The tower process lasts from about midnight the previous day to around the afternoon the next day. The rig is tilted to where the audience can't see the stage before the show. When the show comences, the rig raises, slowly revealing the stage swallowed in smoke. At the very end of the show, the rig finally raises up right against the back wall almost vertically. Like on the Live Killers Live album cover.
(This applies to other tours using the Pizza Oven, such as Jazz 1978 and Live Killers 1979.