I think that if the allies decided to use the vetrans of the whermacht to fight the russians they would have had to supply the majority with US equip. . They might be able to form small kampf groups with german equip. but, with most of the production facilities in ruins it would take time to get them up and running to equip. the hundred of thousands of former axis troops with german arms. The main bonus for the allies are several thousands of troops with expercience fighting the russains at their disposal.