Easy to print M10 Wolverine, 1/100 scale, will want some greebling if scaled up. Some details have been changed for looks/ printability. The turret basket is hollow all the way through, so from some angles you can see the ground underneath the tank. If this bothers you, glue a (thin) piece of paper to the bottom of the turret basket.
Scale by 1.56 for gaslands / hotwheels / 1/64
Scale by 1.786 for 28mm / 1/56