I'd say the most polygons are in the wheels, and the missiles. If you can reduce the polygon count of those, it will help alot.
Even 6k polygons is alot. Remember. If you are using bones to rotate the wheels, this will cause a farily decent slowdown, as all bone transformations are done on the CPU.
You might be best putting the tank together in your unwrap program if you can. Then export it and load it as an animated mesh. Then in blitz, you can use find child to break up the model again. Saves you messing about loading wheels and positioning them etc etc.
It's really up to you though.
Even 6k polygons is alot. Remember. If you are using bones to rotate the wheels, this will cause a farily decent slowdown, as all bone transformations are done on the CPU.
You might be best putting the tank together in your unwrap program if you can. Then export it and load it as an animated mesh. Then in blitz, you can use find child to break up the model again. Saves you messing about loading wheels and positioning them etc etc.
It's really up to you though.