The 1971 Ibrox disaster led to the club developing a modern, safe stadium. Willie Waddell visited modern grounds in West Germany during the 1974 World Cup and believed that steep terracing and exits, such as Stairway 13, had to be replaced. The cut in capacity and boardroom changes led to radical plans by architects Miller Partnership, which were published in November 1977. The plans were modelled on the Westfalenstadion, home ground of Borussia Dortmund. They involved a radical reshaping of the stadium, with the old bowl-shaped terracing to be replaced by three new all-seated structures. Only the old Main Stand would remain, with its enclosure providing the only standing room in the ground.