I took the Gridfinity Storage Box by Pred, modified by VersusMakes, and further modified it to allow for sizes from 1x1 to 5x5. I have made all sizes available in all heights from 4U to 30U in 3U increments (in progress).

As of April 2026, I have completed 4U, 6U, 9U, 12U, 15U, 30U; remaining sizes are 18U, 21U, 24U, 27U, and I will probably do a 33U to max out the X1c build volume.

The boxes are fully interchangeable with the originals, including alternative latches or hinges. Included here are the original parts for assembly as well.

Pictured above is a 1x1x30U box, a 1x1x4U box, and a 2x5x4U box.