Great pictures, and there is more then just a 3666 and a 3667 because you have an additional round tower which was not part of 3667, so you have got a bit extra. On the other hand I am afraid that you are missing the turret top of the round tower, you should be able to find loose ones on ebay.
I am up to 7 3666 by now with of course many additional steck lots here and there.My fingers are constantly itching to start building but I can't we need to make the Zoo first :-)