I've finally gotten round to starting my Tamiya Production Turret Tiger II . As well as using an aluminim barrel for the first ime, its also the first time i've used metal tracks ( on a model anyway). If anyone has not tried them yet, i highly recommend them, providing you don't mind the cost. These things are great.I cannot speake well enough about them. Having had plenty of experiance putting together real tracks, i can onesly say these things are perect. They look, feel and move just like the real thing.