Update wiki submodules to November 2025 challenge

challenges/November-2025/readme.md

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-# November 2025 Challenge: "[Challenge Name TBD]"
+# November 2025 Challenge: "Wait, This Was Printed? How Are There No Layer Lines?"
 
 ## Challenge Overview
 
-[Challenge description and theme to be determined]
+Can you achieve the smoothest, most layer-line-free surface finish possible? This challenge pushes your printer tuning, slicer settings, and material knowledge to the limit. The goal is simple but difficult: create a 25mm cube with 2 walls and no top that looks so smooth, people question whether it was actually 3D printed!
+
+This challenge focuses on:
+
+- Surface finish quality and smoothness
+- Proper printer calibration and tuning
+- Optimal slicer settings for layer adhesion
+- Material selection and temperature control
+- The art of making layer lines disappear
 
 ## Challenge Rules
 
 ### Materials & Constraints
 
-- **Filament**: [To be specified]
-- **Maximum Filament Usage**: [To be determined]
-- **Model Specification**: [To be determined]
-- **Print Mode**: [To be specified]
+- **Filament**: 3D Fuel filament (any type: PLA+, Pro PLA+, PCTG etc.)
+- **Nozzle Requirement**: Must use a 0.4mm nozzle (REQUIRED)
+- **Estimated Filament Usage**: Approximately 3 grams (for reference only)
+- **Model Specification**:
+  - **Dimensions**: Exactly 25mm × 25mm × 25mm cube (REQUIRED)
+  - **Wall Count**: Exactly 2 walls (no more, no less) (REQUIRED)
+  - **Top Layers**: 0 (no top surface)
+  - **Bottom Layers**: Standard (as needed for proper adhesion)
+  - **Infill**: 0% (hollow interior)
+- **Print Mode**: Standard FDM/FFF printing (no resin printing)
 
 ### Competition Categories
 
-- **[Category 1]**: [To be determined]
-- **[Category 2]**: [To be determined]
-- **Overall Winner**: Best overall submission
+- **Smoothest Surface**: Best overall surface finish with minimal visible layer lines straight off the printer
+- **No post-processing allowed** - cubes must be judged as-printed
 
 ### Judging Criteria
 
-1. **[Criteria 1]** ([%]): [To be determined]
-2. **[Criteria 2]** ([%]): [To be determined]
-3. **[Criteria 3]** ([%]): [To be determined]
-4. **Challenge Adherence** (10%): Following all challenge requirements
+1. **Layer Line Visibility** (100%): The appearance and visibility of layer lines - less visible is better
+   - All cubes must meet basic challenge requirements (25mm cube dimensions, exactly 2 walls, no post-processing)
+   - Winner is determined solely by smoothness of surface and minimal layer line appearance
 
 ### Submission Requirements
 
-- **[Requirement 1]**: [To be determined]
-- **Documentation**: Include photos showing [specific aspects]
-- **Settings Documentation**: Share printer settings used
-- **Process Notes**: Brief description of techniques used
+- **Physical Model**: Bring your printed 25mm cube to the December meetup for judging
+- **Dimension Verification**: Must be exactly 25mm × 25mm × 25mm
+- **Wall Count Verification**: Must show exactly 2 walls when inspected
+- **Documentation**: Include photos showing:
+  - Close-up surface details
+  - Overall cube appearance
+  - Cross-section or wall thickness (optional)
+- **Settings Documentation**: Share your winning settings:
+  - Layer height
+  - Print temperature
+  - Print speed
+  - Cooling settings
+  - Any special techniques used
+- **Process Notes**: Brief description of your approach
 
 ### Evaluation Process
 
-- **[Evaluation Method]**: [To be determined]
-- **Community Voting**: People's choice award
-- **Technical Review**: Expert panel assessment
+- **Dimension & Wall Check**: Verification of 25mm cube dimensions and exactly 2 walls (must pass to be eligible)
+- **Visual Inspection**: Expert panel examines layer line visibility under good lighting
+- **Community Voting**: People's choice for most impressive result
 
 ## Prizes & Recognition
 
 ### Awards
 
-- **[Award 1]**: Recognition + prize
-- **[Award 2]**: Recognition + prize
-- **Overall Winner**: Grand prize + recognition
+- **Smoothest Surface Winner**: Best layer-line elimination straight off the printer
 - **People's Choice Award**: Community favorite
-- **Innovation Award**: Most creative technique
 
 ### Documentation
 
 - Winner photos for social media sharing
-- Video documentation of winning techniques
-- Settings and process sharing for community learning
+- Settings profiles shared with community
+- Technique documentation for learning
 
 ## Timeline
 
-- **Challenge Announcement**: [Date TBD]
-- **Submission Deadline**: [Date TBD]
-- **Judging Period**: [Date Range TBD]
-- **Winner Announcement**: [Date TBD]
+- **Challenge Announcement**: November 12, 2025 (at November meetup)
+- **Submission Deadline**: December 10, 2025 (at December meetup)
+- **Judging Period**: December 10, 2025 (during December meetup)
+- **Winner Announcement**: December 10, 2025 (end of December meetup)
 
 ## Model Creation Instructions
 
-[To be determined based on challenge requirements]
+### Using the Provided Model
+
+**Download the pre-configured cube:**
+
+- **File Location**: [Challenge Files/November2025/Cube.3mf](../../Challenge%20Files/November2025/Cube.3mf)
+- **Pre-configured**: Already set to 25mm × 25mm × 25mm with 2 walls and no top
+- **Ready to slice**: Import into your slicer and adjust settings for your printer
+
+### Creating the Cube Model from Scratch
+
+#### Using Bambu Studio
+
+**Step 1: Add Primitive**
+
+1. Open Bambu Studio to a new project
+2. Right-click on the build plate
+3. Select "Add Primitive"
+4. Select "Cube"
+
+![Adding Cube Primitive](../../.images/Nov-Comp-ss1.png)
+
+**Step 2: Resize the Cube**
+
+1. Click to resize the cube
+3. Set X to 25mm and Y and Z should also set to 25mm(If uniform scale cause issue you can uncheck)
+
+![Resizing Cube Dimensions](../../.images/Nov-Comp-ss2.png)
+
+#### Alternative Methods
+
+- **Fusion 360**: Create square sketch (25mm × 25mm), extrude to 25mm height
+- **Tinkercad**: Use cube shape, adjust dimensions to 25mm × 25mm × 25mm
+- **FreeCAD**: Create cube with specified dimensions
+- **Any CAD Software**: Simple cube 25mm × 25mm × 25mm
+- **Use provided file**: Open `Challenge Files/November2025/Cube.3mf` directly
+
+### Basic Cube Setup
+
+### Slicer Configuration
+
+1. **Create or Download Model**:
+   - Use the provided `Challenge Files/November2025/Cube.3mf` file
+   - Or create using any CAD software (25mm × 25mm × 25mm cube)
+   - Or use the Bambu Studio/Orca Slicer primitive steps above
+
+2. **Slicer Settings** (Critical):
+   - **Dimensions**: 25mm × 25mm × 25mm
+   - **Wall Count/Perimeters**: 2
+   - **Top Layers**: 0
+   - **Bottom Layers**: 3-5 (as needed)
+   - **Infill**: 0%
+   - **Layer Height**: Your choice (hint: smaller = smoother, but slower)
+
+3. **Tips for Success**:
+   - **Lower layer heights** (0.1mm-0.12mm) help reduce visible lines
+   - **Slower speeds** improve surface quality
+   - **Temperature tuning** is critical for layer adhesion
+   - **Linear advance/pressure advance** can help with consistency
+   - **Proper cooling** prevents warping without sacrificing layer bonding
+   - **Material choice** matters - some filaments naturally produce smoother surfaces
+
+### Advanced Techniques to Consider
+
+- **Slicer Tricks**:
+  - Adjust line width for better wall fusion
+  - Experiment with different seam positions
+  - Use variable layer heights if supported
+  - Try different acceleration/jerk settings
+
+- **Material Selection**:
+  - Experiment with different 3D Fuel filament types
+  - Colors can also give different appearance levels
+
+### What NOT to Do
+
+- Do not exceed 2 walls
+- Do not add a top surface
+- Do not deviate from 25mm cube dimensions
+- **No post-processing allowed** (no sanding, heat treatment, chemical smoothing, etc.)
+
+
+Good luck creating the smoothest cube possible! May your layer lines vanish into nothingness!