concept of using a moving assembly line to make cars, where the chassis would be moved to the workers for components to be installed. This effort was led by Charles E. Sorensen, the assistant to Peter E. Martin, who was the factory's superintendent. Sorensen believed that a moving assembly line would make car assembly faster, simpler, and easier. The experiments consisted of tying a rope to a Model N chassis and pulling it across the factory's third floor on skids until its axles and wheels were added. The chassis would then be rolled across the floor in notches, where specific components would be attached. At least one Model N was completed at the Piquette Avenue Plant using this process. Although Henry Ford encouraged these experiments, he did not implement a formal moving assembly line at the Piquette Avenue Plant, as all of his attention was focused on getting Model T production started on time. Despite not having a moving assembly line, the Piquette Avenue Plant, aided by the usage of interchangeable parts and other production improvements, produced 101 completed cars in a single day on June 4, 1908, an auto industry record at the time. The first production Model T was completed at the Piquette Avenue Plant on September 27, 1908. On May 1, 1909, due to overwhelming demand, Ford Motor Company stopped taking Model T orders for two months. To satisfy the unprecedented demand for the Model T, the company moved most of its car production activity to the new, larger Highland Park Ford Plant in Highland Park, Michigan, by January 1910. The company completely vacated the Piquette Avenue Plant by October 1910. The concept of using a moving assembly line to manufacture cars would be fully implemented at the Highland Park Ford Plant, starting on October 7, 1913. Over 15 million Model T's would eventually be built, and the first 14,000 made in the United States were assembled at the Piquette Avenue Plant. After Ford in the 20th century The Ford Piquette Avenue Plant was sold in January 1911 to Studebaker, a major maker of various horse-drawn road vehicles since the 1850s. That same year, when the railroad spur line serving the factory was raised above street level, the loading dock behind the building was replaced with an elevated platform, level with the second floor. Also in 1911, Studebaker acquired the E-M-F Company, which owned a different car