OK, I see your point. IS-2 and IS-4. Different hull shape, totally different turret, different rear deck, sharper angle on the glacis plates, different auxiliary fuel drum placement. The models would be near identical at 30 feet.

The IS-7 is a nice looking monster, albeit almost a paper one. I just thought that as you were doing Centurions, that were produced albeit in small numbes, you'd fancy something similar. Your toys, your choice.