Expandable Multi-Layer Retro Storage Box (No Additional Screws Needed)

I personally love expandable storage boxes, so I modeled one myself. The exterior is inspired by retro suitcases, with cute and dynamic raised straps.

The print files are divided into three parts:

1. Three box bodies (two bodies for storage and one lid) Note: The lid can be placed with the "strap" side down to reduce support. In my file, the "strap" side is facing up, allowing you to choose your preferred print pattern for the top layer, but this requires removing supports afterward.
2. Eight dowel pins Note: Print the pins horizontally; the seam will vary randomly. This increases strength.
3. Four side rotating arms Note: All arms are the same length.

For assembly, it is best to use small pliers or tweezers to hold the dowel pins vertically and insert the rotating arms from above.

Pay attention to the box body orientation during assembly; ensure the four connection points are correct. Refer to the model photos or the rotating arms to identify the connection points.