Welcome to the Strelets Forum. Please feel free to discuss any aspect of 1/72 scale plastic figures, not simply Strelets. If you have any questions about our products then we will answer them here.
I doubt the chain track would have worked as a kit of parts or rubber belt, perhaps some kind soul will produce an etched set to complete the details on the model... failing that could always add a set of simple plates to the wheels with strips of plastic card joining them not perfectly accurate but should look ok