Wow Cadster - thanks for all that feedback! That’s really nice of you . . .
This was for a test, of sorts, so I was limited to 800 polygons. So I had 12 polygons to spare in this model.
But yeah, after I thought about it I realized that the square main gun wasn’t such a good idea. 
The images I had to work with were pretty good for like the side, back and front shots, but there wasn’t much at all to go by when it came to doing the top - only one image and it wasn’t a very good one at that.
And thanks for the tweaked map as well! I downloaded it to have a closer look at it.
Just as FYI’s, the side of the tank is a photo, the front lights and the back lights were grabbed from photos, the vents on the back were from some other photos of vents that I had laying around in my collection and I grabbed 1 section of a tank tread from a photo and duplicated it across my tread polys. The wheels were hand made in Photoshop and all the rest of the embellishments and doodads were done in Photoshop.
Again - thank you so much for all your input! Like you said - it is so helpful to have others to learn from since I don’t know too many people in the game industry . . .
Later!
. . . Kim