Customizable, Stackable Box for Parts Collection v3.1.

The magnet was removed, just using edge grip for cover and stacking. The stacking is fully compatible with Customizable, Stackable Box for Parts Collection (v2.0).

See also: Customizable Toolbox v1.0

Changes on v3.1:

• Support partition customizing up to 4 partitions (adjustable each by 1/100 of length)

Changed on v3.0:

• Thickness of all walls are reduced by default, so it is lighter and needs less PLA.
• Made the top edge separated from the side walls to make it stronger than walls.
• Added an angle at the bottom of the side walls to make it easy to detach.
• For the v2, the internal space was divided as three blocks of the almost the same size but now v3 has spaces of 1/2, 1/5, and 3/10.