Update for November: Remove date callout, update current challenge, add December template

challenges/December-2025/readme.md

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+---
+gitea: none
+include_toc: true
+---
+
+# December 2025 Challenge: [TITLE TBD]
+
+## Challenge Overview
+
+[Challenge description to be determined]
+
+This challenge focuses on:
+
+- [Key focus area 1]
+- [Key focus area 2]
+- [Key focus area 3]
+
+## Challenge Rules
+
+### Materials & Constraints
+
+- **Filament**: 3D Fuel filament (type TBD)
+- **Additional Requirements**: [TBD]
+- **Estimated Filament Usage**: [TBD]
+- **Model Specification**:
+  - **Dimensions**: [TBD]
+  - **Special Requirements**: [TBD]
+
+### Competition Categories
+
+- [Category 1]: [Description]
+- [Category 2]: [Description]
+
+### Judging Criteria
+
+1. **[Criteria 1]** ([XX]%): [Description]
+2. **[Criteria 2]** ([XX]%): [Description]
+3. **[Criteria 3]** ([XX]%): [Description]
+
+### Submission Requirements
+
+- **Physical Model**: Bring your print to the January meetup for judging
+- **Documentation**: Include photos showing:
+  - [Photo requirement 1]
+  - [Photo requirement 2]
+- **Settings Documentation**: Share your settings:
+  - [Setting 1]
+  - [Setting 2]
+- **Process Notes**: Brief description of your approach
+
+### Evaluation Process
+
+- **Initial Verification**: [Verification requirements]
+- **Visual Inspection**: [Inspection criteria]
+- **Community Voting**: People's choice award
+
+## Prizes & Recognition
+
+### Awards
+
+- **[Award Category 1]**: [Description]
+- **People's Choice Award**: Community favorite
+
+### Documentation
+
+- Winner photos for social media sharing
+- Settings profiles shared with community
+- Technique documentation for learning
+
+## Timeline
+
+- **Challenge Announcement**: December 10, 2025 (at December meetup)
+- **Submission Deadline**: January [TBD], 2026 (at January meetup)
+- **Judging Period**: January [TBD], 2026 (during January meetup)
+- **Winner Announcement**: January [TBD], 2026 (end of January meetup)
+
+## Model Creation Instructions
+
+### Creating the Model
+
+[Instructions TBD]
+
+### Slicer Configuration
+
+[Configuration details TBD]
+
+### Tips for Success
+
+- [Tip 1]
+- [Tip 2]
+- [Tip 3]
+
+### What NOT to Do
+
+- [Don't do this]
+- [Don't do that]
+
+---
+
+**Challenge details will be announced at the December 10th meetup!**