Poland has joined NATO and need to conform to the standard Nato ammunition. There are three suggestions on how to do this.
1. Buy new 120mm guns for the existing T-72's.
2. Rebuild the T-72's with old Leopard 2 turrets.
3. Buy second hand Leopard 2 tanks.
Personally I think that the third alternative will win, but I really liked the sketch of the T-72 with the Leopard turret. I had to build one before the decision of the future tank force of Poland would be made. I had the old ACE T-72 hull and a Revell Leopard turret, all I needed was some wheels as the T-72 wheels was unusable. (That was the reason why the kit never was finished) I found that the Airfix Centurion had wheels of the right size, so there it is. A tank I don't think will ever exist.