Looking nice! If I may offer a constructive criticism of you chassis bottom, it's a little too consistent in its rust finishes. For example you have the floor metal exactly as rusty as the exhaust, and that is exactly as rusty as the gas tank. In the real world, the floor would have been painted and maybe undercoated as well, so would rust more slowly than the exhaust. Gas tanks are galvanized, and might dull and get dirty, but show little or no rust. You build style is clean and realistic otherwise, and I like it very much!