Infinitely Stackable 9-Compartment Storage Box

📦 9-grid organizer box (with lid, stackable version)
Model Parameters
Parameter    Specification
Dimensions    128 × 128 × 32 mm

                     Wall thickness 2mm
Single cell dimensions    40 × 40 mm
Number of cells    9 cells (3×3 layout)
Printing material    PETG
Support requirements    ❌ no supports
Stacking function    ✅ Infinitely stackable
accessories    With independent lids
🖨️ Printing Suggestions
Filament recommendations
Recommended: PETG (good toughness, impact resistance, suitable for organizer boxes)
Optional: PLA+ (easier to print, but slightly less tough)
Avoid: Pure PLA is brittle and may crack with long-term stacking
⚠️ Key Considerations
1. Seam position control (Important!)
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❌ Avoid: Random seam distribution → Affects appearance and stacking stability
✅ Recommended: Seams uniformly aligned to corners → Aesthetically pleasing and more stable structure
Slicer settings (e.g., PrusaSlicer/Cura):

PrusaSlicer: Seam position → "Aligned" → Select "Corners"
Cura: Seam position → "Shortest" or "User specified"
2. Stacking structure design
Top with reserved snap/groove, corresponding protrusions at the bottom
Stacking clearance recommendation: 0.1-0.2mm (to avoid being too tight)
Lid uses snap-on or sliding type for easy opening and closing
3. PETG printing tips
Problem    Solution
Stringing    Increase retraction distance (1-2mm), lower temperature
Bed adhesion too strong    Bed temperature no more than 80°C, use glue stick for isolation
Layer adhesion    Reduce printing speed, ensure sufficient melting