Needed for my MODERN, TODAY railroad…automobile transport cars that are to scale…something that will hold 5-10 scale cars…not 2 or 3 cars…MODERN tankers…the models i have seen have huge portals (for lack of a better term) on top…on 1:1 rails, the tankers i have seen all have small portals on top…why must we wait for TODAYS modern rolling stock, while YESTERDAYS rolling stock is what is being produced???