Weighted Companion Cube DIY selection

I designed the whole cube so sharing these files was not
much more work and I think it could be usefull for some
design projects.
All these files are in the sice to fit on a box 100x100x100mm
scale them down or up for your personal box design.
For example: for a box 542x542x542 use a scale of 5.42

please show some pictures if you've build something with these.