Stage 6: Peta Cube.
Four months of planning, counting paper squares, folding them, and assembling the folded units.
5,046 units overall, following a formula I came up with when I was 15 that correlates the number of cubes on one edge x with the total number of units U:
U = 36x^3-90x^2+90x-30
The unit design can be found in the book “Unit Origami- Multidimensional Transformations” by Tomoko Fuse.