Upright organizer stand with a 4x4 grid of 15mm slots, 80mm tall.

Good for rasps, files, small screwdrivers, pens, bits — anything

with a ~7-8cm shaft you want standing up.

Design choices:

• Solid 20mm band at top and bottom keeps tools separated and adds

•   stability (mass low to the ground).

• - Middle 40mm band has hex windows cut clean through the whole box

•   (outer wall → all 3 internal dividers → opposite outer wall), so

•   even the 4 inner cells are visible. Windows align with cell

•   centers so nothing is blocked.

• - Dividers stay full-height solid at the top/bottom bands, so tools

•   stay in their own cells.

Fully parametric — edit the .scad. Top of the file has all the

knobs: cells(grid size), cell(slot width), height, hex_r,

etc. Want a 3x3 pen stand? Set cells = 3. Want deeper slots? Bump

height. Everything rescales.

Outer dimensions at stock settings: ~68 x 68 x 80 mm.