I'm kind of on the fence with metal hulls.
I know you have less flex with them, but with added weight don't you need stronger motors and gear boxes. I don't if a heavier tank would battle well on our battlefield.
I rather they came out different models instead.
HL Panzer III | HL Tiger | HL Jagdpanther | HL Panther | Mato Sherman
Hooben Elefant | HL Pershing | HL Bergepanzer IV | Tamiya Leopard 1A | WSN T-34
HL "Golden" Pan-Tiger | M16 Halftrack | HL Panzer IV | Tamiya KV-1 | Tamiya Tiger