I just updated a previous post about my plans to create a local copy of PubMed with a few more remarks about how I intend to proceed. I hope to have that work completed in the next two or three weeks. Check it out here: https://shiftingbalance.org/?p=244. It will be a challenge to integrate the various data sources, including PubMed, our previously existing BibTeX database, and records in MARC format with one another. Semantic interoperability will be the greatest challenge.