The only thing that doesn't fit between the Impact and Tamiya/Clark mounts is the alignment bump on the base and apples. They can be easily modified to fit each other, the wire set up is the same.
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