• 45.2 baseline — 0.6 × season 49.5 (18 gm) + 0.4 × last 10 38.7
• −4.5 opponent leak — they concede 1519.7/game vs a 1686.6 league average
• at this ground: too thin to count (1 gm) — shown, adds nothing
• vs them: averages 82.0 over 5 games — evidence, never summed

Derived, not measured — plain arithmetic over his real games, shown in full. Adjustments can overlap (a game at this ground can also be a wet one); they add simply, and this note is the admission. Round 8: 115 — far outside his usual range; kept in the average, not smoothed away.