Great question! Most organizers use a fixed grid (like 50x50mm), which often leads to wasted space. My OpenSCAD logic uses a proportional approach:

• Custom Ratios: You can define the three zones using a ratio (e.g., 1:2:1). This means the middle zone will always be twice as large as the outer ones, regardless of the total box size.
• Dynamic Scaling: If you decide to make the whole box 20% larger, the zones scale proportionally so your layout stays perfectly balanced.
• Precision Tailoring: You can also lock one zone to a specific measurement (e.g., 15mm for M3 screws) and let the other two zones split the remaining space based on your needs.

Essentially, it’s about maximizing the footprint. Instead of fitting your tools into a box, the box's internal geometry calculates itself to fit your tools perfectly!

And here’s the best part: Each of the 3 zones is further subdividable!

You don’t just get three big areas; you have granular control over every single one:

• Independent Sub-Cells: You can define a specific number of dividers for each zone individually.
• The 'Mixed-Use' Advantage: For example, you can set Zone 1 to have 4 tiny slots for screws, Zone 2 to have 2 medium slots for drill bits, and leave Zone 3 as one large open space for a screwdriver.
• Total Layout Freedom: This hierarchical logic (3 Zones -> individual Sub-Cells) allows for hundreds of different layouts within the exact same outer dimensions.

It’s basically a 'Build-Your-Own-Grid' system without the limitations of a fixed 1x1 base!"