# Page Not Found

The URL `recipes/upgrades/modifiers` does not exist.

You might be looking for one of these pages:
- [Recipe modifiers](https://frinn.gitbook.io/custom-machinery-1.21/recipes/upgrades/recipe-modifiers.md)
- [Component modifiers](https://frinn.gitbook.io/custom-machinery-1.21/recipes/upgrades/component-modifiers.md)
- [Upgrades](https://frinn.gitbook.io/custom-machinery-1.21/recipes/upgrades.md)
- [Position](https://frinn.gitbook.io/custom-machinery-1.21/recipes/requirements/position.md)
- [Item filter](https://frinn.gitbook.io/custom-machinery-1.21/recipes/requirements/item-filter.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://frinn.gitbook.io/custom-machinery-1.21/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://frinn.gitbook.io/custom-machinery-1.21/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/custom-machinery-1.21/recipes/upgrades/recipe-modifiers.md`)
- Use `Accept: text/markdown` header for content negotiation