 This show was a notorious flop and the first problem was the "marble  machine." It was huge, unbalanced and very uncooperative. It was  about 20 feet high and 14 feet wide and almost impossible to play.  The carpentry shop at NBC had wisely decided not to build it because  they could see from the designs that it had a lot of flaws and  questionable engineering. It was subcontracted out to an independent  scenery shop. It was shipped in sections to NBC on a Friday but was  back in the workshop the next week. In removing the largest section  from the truck at the NBC loading dock it fell and cracked wide  open. It was repaired and some of the problems were corrected when  it was sent to NBC. It was still a fragile giant. Normally a set  would move out of its studio after taping so that another show could  use the space but the "marble machine" would break each time it was  moved so the tapings were held day after day until there were enough  for the first half season. Fortunately that was several more shows  than were needed as the show was yanked before the end of 1975 and  no one ever heard from the "Magnificent Marble Machine" again.