Not wanting to wait for the delivery from Aliexpress I searched for a design to print. Found that one from FLA_Labs and liked the idea. But I don't like fillets by design (chamfers get rounded some anyway) and also the thin outer hinge eyes (please correct my terminology...) so I recreated it from scratch. FreeCAD file is mostly parametric by changing the DynamicData (dd) variables. The STLs provided are for a 20mm single cube size and 5mm wide, 3mm thick connector. You will heed 4 normal cubes, 4 mirrored cubes (any slicer should have that function) and 16 connectors. I printed mine in groups - 1 cube, 2 connectors. Check Vertical-Joint-Flipped Yet Another Fidget Infinity Cube v2 for another way to connect the cubes. The second one (blue/yellow one is assembled like that)

Added Trapezoidal piece for recreating the Cut Kobayashi Fidget Cube (Infinity Cube, parametric) design.

Please any comments,, suggestions, ... are welcome. Please share your makes.