Remember, this is a forensic audit. Inspections on ballot copies, copies of copies, printer pre-printed ballots for Biden, no folded crease ballots, printer, paper quality anomalies, ink discrepancies, watermarks (if any), fingerprints (yes, the audit is actually a crime scene). Candidate bubbles filled in by computer, Sharpie marker usage to cancel out ballots, off center bubble discrepancies and so on. These I can think of off the top of my head. Any others I missed? reply and comment, please!