- Create challenges/ directory structure with monthly subfolders
- Move October challenge to challenges/October-2025/readme.md
- Create challenge template in challenges/readme.md
- Add November 2025 placeholder in challenges/November-2025/readme.md
- Convert challenges.md to summary page with links and archive
- Update image paths for October challenge screenshots
- Add comprehensive challenge participation and development info
- Remove emojis from all markdown headings for cleaner appearance
- Delete 'Tips for Success' section to streamline content
- Maintain essential challenge rules and requirements
- Add step-by-step instructions for creating 25mm x 50mm cylinder
- Include screenshots showing primitive creation and resizing process
- Add alternative CAD software options for participants
- Provide visual guidance for challenge model creation
- Replace pre-supplied model with standard cylinder specification
- Update to vase mode printing (~6g filament vs 250g limit)
- Add vase mode specific tips and requirements
- Update timeline to reflect model spec release date
