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This is the longer, fourteen-wheel version of the Kliment Vorošilov heavy tank chassis. This one is used for the KV-220 and several others. The round-turret version of the KV-3 (object 223) uses one that is identical, but without the reinforced turret ring, while many of the proposed designs for the KV-4 also would have used this chassis. I imagine that if the tall KV-2 turret were placed on this chassis, some of the problems with the KV-2 would be mitigated (though I personally would just put a better transmission in). Much like my standard KV chassis, any of my heavy tank turrets, with the exception of Object 279, will fit on this hull.