I rigged my conceptual turret and simulated a slalom drive, just to see if I like the design in a practical use. I believe it behaves nicely, although center of gravity is a bit too high to be safe. But then again, the original design was intentionally clunky, so that u could grab them and toss'em easily. I don't really know if placing 10 or 15 of these puppies in a scene will bog my system down...I'll try. Anyway, I could always animate them separately and bake the animation information into each model, or even use some kind of animated vrayproxy or point cache. I believe it's a matter of complexity in terms of animation information more than mesh density.