1. WHAT IS THIS PROJECT?
This model is inspired by traditional Kumiko patterns. The triangle dimensions are taken as a reference, but the entire connection and mounting system has been designed completely from scratch.

✅ Minimal parts
✅ Hidden connections
✅ Ready-to-use wall mounting system
✅ No print marks on the front surface

2. HOW DOES IT WORK?
🔧 Parts:

1. Contour Panels — these form the "picture frame."
2. Inner Panels (Fillers) — these create the Kumiko pattern itself.

🧱 Assembly:
Assembly proceeds from left to right, top to bottom:

1. Start with the Top Left corner panel.
2. Move down to the Bottom Left corner panel.
3. Then shift right and repeat the process — up to the Top Right and Bottom Right corner panels.

📐 Panel dimensions are determined by the fillers:
• Top/Bottom Middle — defines the width.
• Main Middle — defines the internal filling.

🧠 The assembly is intuitive. The main rule is to maintain the order: top to bottom, left to right.

3. WALL MOUNTING (IMPORTANT!)
Grooves for brass nuts are provided in the top edges of each "Top" type panel.

🔩 Mounting Hardware:

1. Inserting the Nuts
   • Brass nuts are inserted (melted) into the grooves.
   • Tool: Soldering iron.
   • Quantity: 2 nuts per each top panel.
2. Knurled Head Screws
   • Special screws with knurled/thumbscrew heads are screwed into the nuts.
   • They allow you to hang and remove the picture without tools.

🧱 Mandatory Mounting Rail (Traverse)
⚠️ Important: Never hang the panel directly on nails or screws inserted straight into the nuts. This creates point loads and can damage the plastic.

✅ The correct solution is a mounting rail (traverse):
• Profile: L-shaped aluminum profile (typically used for glass panels).
• Thickness: 3.6 mm.
• Installation: The rail is rigidly fixed to the wall (using dowels or screws).
• Hanging: The picture, with its screws installed, is hung onto the shelf of the rail.

📐 How it works:
• The rail takes the load and distributes it evenly along its entire length.
• The knurled head screws simply rest on the edge of the profile.
• The picture hangs stably, without warping or sagging.

4. PRINT SETTINGS
✨ Ironing
In my project, I use Ironing — the final surface smoothing pass.

Important:
• Print time increases by 20–30% .
• If a perfectly smooth surface is not critical for you — simply disable Ironing in your slicer settings.

5. FILAMENT
✅ Recommended: Standard PLA
❌ NOT recommended: PLA Lite

Why?
PLA Lite has greater shrinkage. In my tests, fillers printed with PLA Lite fit more loosely within the triangles.

👉 This is not critical if the panel will simply hang on the wall. But if you plan to frequently move or shake the structure — use standard PLA.

6. WHAT'S INCLUDED IN THE SET?
For now, I have only designed the specific types of fillers that I personally needed for my own project.

📌 If this model proves popular
📌 If you write in the comments which patterns are missing

…I will expand the library and add new filler shapes.

7. QUESTIONS & FEEDBACK
If you have any questions about assembly, printing, materials, or design — please don't hesitate to ask in the comments.

📬 I strive to answer as thoroughly and quickly as possible.

M3 Brass Nuts (OD5) Length - 8mm (You will need: M3 brass nuts (outer diameter 5mm, length 8mm) — 2 pcs per top panel)
 

Hardware: M3 carbon steel knurled thumb screws — 2 pcs per top panel (length 8-10mm)

Mounting rail: 3.6mm anodized aluminum L-shaped profile (glass mounting type) — cut to desired length