A fully printable modular storage system built around a shared-axis sector layout.

Instead of using one pivot per sector, this design allows two opposing sectors to share a single axis, improving packing density while keeping access clean and symmetric.

The system is based on fractional modular sectors, allowing flexible layouts depending on how much subdivision is needed.

Features

• Shared-axis dual-sector design
  Two sectors share one pivot axis and open in opposite directions.
• Fractional modular sectors
  Supports full, 3/4, 2/3, 1/2, 1/3, and 1/4 sector pieces.
• Mixable layouts within one divider
  Examples:
  • 1/3 + 2/3
  • 1/3 + 1/3 + 1/3
  • 1/2 + 1/4 + 1/4
• Double half-axis design
  Printed horizontally for improved strength and print-friendly orientation.
• Dense radial layout
  Efficient use of spool circumference while keeping the structure compact.
• Fully printable
  No screws, magnets, glue, or additional hardware.
• Thumb cutout for easier sector access
  Makes opening tightly packed sectors easier.

Compatibility

This model is designed for one of the Kingroon spool variants. I have also seen the exact same side-profile design used by at least one other local brand. If you recognize the spool side profile, this should fit.

Any feedback is appreciated.