1970 was a very successful year for Hot Wheels, so Mattel came up with a new advertising slogan for the cars: "Go With the Winner". 43 new cars appeared this year. This was also the year that Sizzlers and Heavyweights lines appeared. Howard Rees, who worked with Ira Gilford, was tired of designing cars. He wanted to work on the Major Matt Mason action figure toy line-up. Rees had a good friend by the name of Larry Wood. They had worked together at Ford designing cars. When Wood found out about Hot Wheels at a party Rees was holding, Rees offered Wood the job of designing Hot Wheels models. Wood agreed, and by the end of the week, Wood was working at Mattel. His first design would be the Tri-Baby. After 36 years, Wood still works for Hot Wheels.