Run python3 panel_model.py --factor .50, then .55, or omit the option to enter a number. It uses only Python's standard library; it makes no network call, collects no personal data and stores nothing. The printed record is invented. On paper, calculate 160×r^n for n=0–4 and compare each result with Source B; the paper route teaches the same question. A better arithmetic fit does not verify any material or mechanism. The source code is original and licensed under Apache 2.0.