As you said, PETG was the way to print these Gigantic cubes. I got a set to print in Bambu PETG Basic Black, used Bambu PLA Basic Red for the hinges and clips. Didn't need the filament to secure the corners, the PETG popped the clips easily into the slots along the edge of the cube (the first one I printed in PLA cracked around the base edges...the PETG cubes flexed perfectly). I had some left-over balls from another project, so I slipped three 1g PLA balls into each cube. Also, since I was opening the cubes to add the balls, I used your jig to cut filament for the corners to match your assembly instructions... These huge folding cubes are fantastic. They fold over with gravity from the beginning, the balls inside sound like a plastic waterfall, the cubes are sturdy from every angle. Even with the added balls, the cube only weighs 93g. I already have a co-worker asking for one XD Next, I'll try your new profile using PLA again : )

The 80mm cubes are absolutely Epic! These are so much fun, and I *have* to get some transparent PETG for these! The cubes are rigid and sound even without the corners anchored with a slip of filament. I couldn't help but notice the hinges and clips are the same size for all these print profiles, well played! Your designs are so well-considered...I have to know what software you use to create them.

...making good on my threat, I did try to open the model to add 'things'. In attempting to open/close these cubes (and, yes, during assembly), the single layer of filament gave way around the edge of the cube (just above the bevel as it lays on the print plate - see the attached picture). If you could strengthen the first ten or twelve layers, I think that would increase the tensile strength around the bases of the cubes without interfering with the tabs that hold the halves together. I think if you double the cube thickness all the way around it might be detrimental to the overall weight and cost in filament, but I'm willing to have another go at it in either case :) I see that this model was made for the A1 mini, which has a smaller print volume than the P1S I'm running. I would definitely print an even larger version of this model, and, just to address the absurd, a single cube half measuring 20cm to one side would be hilarious. I will, however, freely admit that, if I had a table or booth selling plastic toys, THIS would be prominently displayed, as is...it would be it's own sign. I think the overall design has great merit and needs a more research and testers :) To that end, I want to try to explain assembly... First, Infinity Folding Cubes are assembled with four lefts and four rights. I lay the cubes with the hinge slots on the bottom facing me, and the hinge slots on the top of the cube: one facing the left, the other facing the right. (turn the cubes until they match this description) Connect the hinge slots facing each-other, and you have the basic pattern...just do it again three more times. Once you have four lefts and four rights (connected at the top with the hinge slots at the bottom facing the same direction) insert hinges in the bottoms of *two* of your pairs. Next, fold and flip over the other two pairs, and then snap them all together...see the picture with the copper colored cubes, it's all assembled to the last hinge.

I started 3d printing in October, was fascinated by folding cubes from the beginning. I've chewed through a few other models on MakerWorld, and disregarded yours at first because I was intimidated by the assembly process. Until I built a few dozen of these: "Infinity Cube with balls inside https://makerworld.com/en/models/42657#profileId-107333 ", I didn't look at this model. Now I understand the maths, and this is just four lefts and four rights... This is a brilliant model. The single wall construction is deceptively strong, especially leveraging the tab-and-slot at the middle of the span where the filament is weakest. When turning this cube on it's hinges, the cubes felt a bit like they are made from cardstock as they're so light compared to their size. I used Bambu PLA Basic White for the cubes and Bambu PLA Basic Red for the hinges/tabs, they responded very well: one cube cracked during assembly and is largely unnoticeable, the first plate of hinges/tabs went spaghetti on me so I added stick glue to the plate. The s-hinges are perfectly strong and pop right into place. Next, I plan to disassemble these, then add small objects to rattle around inside, much like the balls model.

very light, but enough bracing to feel sturdy.

Perfect print, thank you for this awesome Model

This took 3 tries to print the connectors, the boxes are fragile, there are no instructions to put it together, and when we followed the image, it doesn’t behave the way we would have expected. VERY disappointed with this print. 😞

Great work