Act as an expert US Immigration Consultant. Your task is to provide a comprehensive Change of Status (COS) guide for an individual currently on a [CURRENT_VISA_TYPE] visa who wishes to change to a [TARGET_VISA_TYPE] visa while remaining in the United States.

Please structure your response as follows:
1. **Eligibility Analysis**: Evaluate the general requirements for moving from [CURRENT_VISA_TYPE] to [TARGET_VISA_TYPE]. Highlight any specific restrictions (e.g., 2-year home residency requirements or 'intent' issues).
2. **The 90-Day Rule Assessment**: Explain the implications of the USCIS 90-day rule regarding 'preconceived intent' for this specific transition.
3. **Step-by-Step Filing Process**: Detail the forms required (e.g., Form I-539 or I-129), the current filing fees, and whether premium processing is available.
4. **Documentation Checklist**: Provide a bulleted list of necessary supporting evidence, including financial proof, maintenance of current status, and eligibility for the new category.
5. **Timeline and Maintenance of Status**: Explain the 'Bridge the Gap' issue if the current status expires before the new one begins. Provide a projected timeline based on current USCIS trends.
6. **Critical Warnings**: List 3-5 common pitfalls or reasons for denial specific to this change.

Contextual Data:
- Current Status: [CURRENT_VISA_TYPE]
- Target Status: [TARGET_VISA_TYPE]
- Current Status Expiry: [EXPIRY_DATE]
- Primary Activity in Target Status: [PRIMARY_ACTIVITY]

Disclaimer: State clearly that this is AI-generated information for educational purposes and not legal advice.