PDF to EPUB Reflow Conversion with Place Preservation

PROBLEM: A page-for-page PDF preserves the original document, but on a phone it is hard to read; an EPUB reflows text to fit the screen, but a reader who switches formats usually loses their place. The Vault offers every manual both ways and keeps the reader's place when switching — yet a conversion pipeline with no quality record cannot show whether the EPUB kept the text, the order, and the tables, or silently dropped them.

SOLUTION: A PDF-to-EPUB reflow conversion record: every conversion logged with its source PDF, its reflowed EPUB, and a place-preservation check — the same passage reachable in both formats at the same point — so a reader who switches from PDF to EPUB on mobile lands where they left off, and a librarian can prove the EPUB did not lose content in the reflow.

EVIDENCE BASIS: DOCUMENTED — T.Rex Arms Field Manual Vault FAQ: "Every manual comes both ways. The PDF is the original document, page for page, either as it was exported or scanned from original prints. The EPUB reflows the text to fit your screen, which makes it far easier to read on mobile devices. If you switch between them in the reader, you can keep your place."