Sette e Mezzo

Sette e Mezzo is a small assembly puzzle made of 9 pieces : 7 octominoes (flat shape made of 8 cubes) et 1 tetromino (flat shape made of 4 cubes) used twice.
The goal is to build either a 8x8 square (there are two slightly different solutions) or a 4x4x4 cube (I only know one solution).
The name of this puzzle comes from the fact that the tetromino can be consideard as half an octomino thus you have seven and half shapes ("sette e mezzo" means "seven and half" in Italian, this is the name of an unrelated card games I was playing when I was young).

The 4x4x4 cube will be approximatively 28x28x28mm, the 8x8 square 56x56mm. The clearances between the parts (when assembled) are 0.125mm.
Note this puzzle is only available in white versatile plastic, because the parts are printed inside a shell that you will have to break by yourself to deliver the 9 parts (this is done to make the model more affordable).