Thats a bit extreme gabbe.... I was thinking the barrels for the most part, and thats small enough. Doesn't have to be PERFECT. Yours look s a bit lopsided, though you have the general idea. I think that textured and in glest, 5 sides is enough for a round object (though something like a wheel deserves at least 12).
There's no easy way to animate tank treads though...
