Puzzle/Storage Box for HedronStack

Like many of you, I enthusiastically printed the HedronStack game. I also played around with how compactly I could stack the sets. I decided it would be nice to have a way to store the pieces as well as make a side puzzle game.

So, I created these trays to hold the pieces. The sides have cutouts, rather than just windows, to make it easier to manipulate pieces and to add lightness. They are stackable, so you really only need to print one lid. I tried not to go overboard with their friction-fit so it might still be a good idea to use a rubber band to hold them together/closed if you'd like to avoid a spill.

If you are interested in storage for the game, print the 4x5 size, as it takes very little effort to fit all the pieces in. If you would like a little bit of a challenge, use the 4x4 size.

The standard 8-piece set can be fit into a 4x4x2 box without using any of the diagonal placement positions between the 1st and 2nd level (where only square surfaces can touch one another).

If you would like a hint, in one solution you can split the 8 pieces into two groups, and each group can be placed to only occupy half of the space (2x4x2). One of the groups contains the straight, the "L", and the square piece (plus one more, so as to not make the hint too large) as seen in the photo.

There is at least one other solution I have found (without nesting) where the straight piece is on the bottom layer along a side, and the square piece is flat and centered along the opposite side. If you do use the nested positions, it can fit in the 4x4 even more compactly

Printing tips

Designed for a 0.4mm nozzle. I suggest printing with 2-3 perimeters and using an outer brim. I have had good results at both 0.2mm and 0.25mm layer heights.

I suggest using enough top and bottom layers to make the base solid (5/5). Sparse infill does not save much filament and actually takes longer to print due to the slower infill bridging layer. It also risks the smoothness of the top surface if the infill percentage is not high enough. However, a solid base does make it less forgiving of overextrusion or wet filament.

For the lid, since it is 2.6mm thick and the top surface will be inside the box, it can be printed with a top/bottom layer setting as low as of 4/4 or 4/3, but should use >=15% rectilinear infill (or something with similar density)

Additional Notes

If you have printed the 8-piece recommended set from the Pentacells expansion, it may be helpful to know that I have not found a solution that fits entirely in the 4x5 size. Maybe I will post a 4x6 size for them.

I'm sure someone will remix the lid to add captive storage for some of the base pieces.