okay spanky but what about the cars that come with MTH and Kline and Lionel on the flats are they not scale. Not trying to be smart or anything just asking a question . I also know some do 1:50 and some also do 1:48 where I'm doing what I thought is 1:43 wich is really correct is 1:50 acually O27 and 1:48 semi scale and 1:43 scale ? just trying to figure this all out .