Where is the fine-tuning source code + data and with what license? Afaict that's the proprietary part which is why it isn't in their github and hf doesn't link to it.

Hence my comment that I don't see how to do further fine-tuning that doesn't just wipe out what this does. They did a free binary release of fine-tuned weights afaict, which is problematic for building a production data pipeline that you re-fine-tune over time.