Chieftan and
Centurion MBT MKs III thru 5 Tanks. There is no model of it, and it has come up in many forums. I think you would have made the only one in existence. I think someone mentioned it in another thread you have. These tank guys really love their tanks. I think you would have a hot item. There are lots of varieties. I posted in that thread someone should ask you, I guess I should of. Weird I did not think of that? You name was the first one that popped into my head!! Link to thread below.
Centurion MBT MKs III thru 5