bernardini CCL X-1
The X-1 was a major Brazilian upgrade for the M3 Stuart tanks during the Cold War; its frontal armor was now resistant to 20mm cannons and the turret could fire HEAT projectiles.
For this tank, I significantly modified the chassis of Bergman's M3, but for the turret, I decided to use AI.
I used the illustration by Bryan Gaydos, which is available in the Tank Encyclopedia.