Thanks to everyone. I am a lot happier with it indeed. Just wish I had started out this way, but the next project will be much better for it.
John, I post pictures of my work as fast as I can build them. Unfortunatley, between work, wife, newborn (July) baby and dog, that isn't very fast

I do have other work in the feature gallery. Currently I am trying to decide on my next project.
Logan, I agree. I will probably add a touch of dark colored pigment to simulate that, as I don't won't to bring the texture gel that high up.
Mike, I agree about the back. I may add a flap in the back to cover it upas the refernce I have shows this too. Unfortunatley, the canvass mud flap in the back doesn't cover as much so I may have to use a bit of creative freedom here. I started to remove the old mud from the back, front and wheels, but this would have caused alot of breakage in the back as well as the tracks (they indi links and are already breaking). At this point covering up may be the better/easier option. As far as the heavy mud on the wheels, well the tank going through a wheat field may help cover that up a bit.
Sean