Thats a great effort brotha, very nice. I am happy that someone took the inspiration and gave it a practical shape. Keep the good work going. Just a little suggestion...look at the tank again, it needs some improvement on the outer line. While working the tires, use the 2HB pencil lightly and do this while holding your breath as it will help making the curve properly.
BTW, you have worked well on the smoke. Appreciate it.
Those who say that its a trace should try tracing one on their own rather than criticizing. It is always easy to critisize others when you can't do anything on your own. Make a note of it!