PentaStack - Packing puzzle

PentaStack is a packing puzzle

The goal is to pack the six pieces inside the box. Each piece is composed of 3 or 4 pentagons. The box has a lid that restricts movement. This is a moderately difficult puzzle, 4/6, with a unique solution.

Print all 6 puzzle pieces in one color, and print the box and the lid in another. The lid has to be glued on top of the box (there is a guide for good alignment).

Please get back to me for any issue or just feedback on the puzzle !

EDIT:
I have uploaded a new version of the lid (one piece lid instead of two pieces, so with a bit more restriction) and of the box to go with the lid.