I have a little difficulty tracking down decent source material for the tank, and get confused whether to follow the toy or the cartoon as they are not quite the same.

But anyway, I chose a method of having the gun and front wheel under the arm, a bit of a cross between toy and cartoon.

You may notice there is no wheel on there as of yet, I'm not sure how to do it as I would like to have it as a seperate entity but constrained to the underarm, just a simple point constrain?

I added a couple of quick simple Lamberts to distinguish between parts.

Please let me know what you think.